diff --git a/.github/actions-pipeline-guide.md b/.github/actions-pipeline-guide.md
new file mode 100644
index 0000000..8c29dc8
--- /dev/null
+++ b/.github/actions-pipeline-guide.md
@@ -0,0 +1,500 @@
+# GitHub Actions CI/CD 파이프라인 구축 가이드
+
+## 📋 목차
+1. [개요](#개요)
+2. [사전 준비사항](#사전-준비사항)
+3. [GitHub 저장소 환경 구성](#github-저장소-환경-구성)
+4. [디렉토리 구조](#디렉토리-구조)
+5. [Kustomize 구조 설명](#kustomize-구조-설명)
+6. [GitHub Actions 워크플로우](#github-actions-워크플로우)
+7. [배포 방법](#배포-방법)
+8. [롤백 방법](#롤백-방법)
+9. [SonarQube 설정](#sonarqube-설정)
+10. [트러블슈팅](#트러블슈팅)
+
+---
+
+## 개요
+
+HGZero 프로젝트의 백엔드 서비스를 위한 GitHub Actions 기반 CI/CD 파이프라인입니다.
+
+### 주요 기능
+- ✅ Gradle 기반 빌드 및 테스트
+- ✅ SonarQube 코드 품질 분석 (선택적)
+- ✅ Azure Container Registry에 Docker 이미지 빌드 및 푸시
+- ✅ Kustomize를 사용한 환경별(dev/staging/prod) 배포
+- ✅ AKS 클러스터 자동 배포
+
+### 지원 서비스
+- **user**: 사용자 관리 서비스
+- **meeting**: 회의 관리 서비스
+- **stt**: 음성 인식 서비스
+- **ai**: AI 처리 서비스
+- **notification**: 알림 서비스
+
+---
+
+## 사전 준비사항
+
+### 1. 프로젝트 정보
+- **시스템명**: hgzero
+- **ACR 이름**: acrdigitalgarage02
+- **리소스 그룹**: rg-digitalgarage-02
+- **AKS 클러스터**: aks-digitalgarage-02
+- **네임스페이스**: hgzero
+- **JDK 버전**: 21
+
+### 2. 필수 도구
+- Git
+- kubectl
+- Azure CLI
+- Kustomize (자동 설치됨)
+
+---
+
+## GitHub 저장소 환경 구성
+
+### 1. Repository Secrets 설정
+
+`Repository Settings > Secrets and variables > Actions > Repository secrets`에 다음 항목을 등록하세요:
+
+#### Azure 인증 정보
+```json
+AZURE_CREDENTIALS:
+{
+  "clientId": "{클라이언트ID}",
+  "clientSecret": "{클라이언트시크릿}",
+  "subscriptionId": "{구독ID}",
+  "tenantId": "{테넌트ID}"
+}
+```
+
+**예시:**
+```json
+{
+  "clientId": "5e4b5b41-7208-48b7-b821-d6d5acf50ecf",
+  "clientSecret": "ldu8Q~GQEzFYU.dJX7_QsahR7n7C2xqkIM6hqbV8",
+  "subscriptionId": "2513dd36-7978-48e3-9a7c-b221d4874f66",
+  "tenantId": "4f0a3bfd-1156-4cce-8dc2-a049a13dba23"
+}
+```
+
+#### ACR Credentials
+
+ACR Credential을 확인하려면:
+```bash
+az acr credential show --name acrdigitalgarage02
+```
+
+등록할 Secrets:
+```
+ACR_USERNAME: acrdigitalgarage02
+ACR_PASSWORD: {ACR 패스워드}
+```
+
+#### SonarQube 설정
+
+**SONAR_HOST_URL 확인:**
+```bash
+kubectl get svc -n sonarqube
+```
+출력된 External IP를 사용하여 `http://{External IP}` 형식으로 설정
+
+**SONAR_TOKEN 생성:**
+1. SonarQube에 로그인 (기본: admin/admin)
+2. 우측 상단 'Administrator' > My Account 클릭
+3. Security 탭 선택 후 토큰 생성
+
+등록할 Secrets:
+```
+SONAR_TOKEN: {SonarQube 토큰}
+SONAR_HOST_URL: http://{External IP}
+```
+
+#### Docker Hub (Rate Limit 해결용)
+
+**패스워드 생성:**
+1. [Docker Hub](https://hub.docker.com) 로그인
+2. 우측 상단 프로필 아이콘 > Account Settings
+3. 좌측 메뉴 'Personal Access Tokens' 클릭하여 생성
+
+등록할 Secrets:
+```
+DOCKERHUB_USERNAME: {Docker Hub 사용자명}
+DOCKERHUB_PASSWORD: {Docker Hub 패스워드 또는 토큰}
+```
+
+### 2. Repository Variables 설정
+
+`Repository Settings > Secrets and variables > Actions > Variables > Repository variables`에 등록:
+
+```
+ENVIRONMENT: dev
+SKIP_SONARQUBE: true
+```
+
+---
+
+## 디렉토리 구조
+
+```
+.github/
+├── workflows/
+│   └── backend-cicd.yaml              # GitHub Actions 워크플로우
+├── kustomize/
+│   ├── base/                          # 기본 Kubernetes 매니페스트
+│   │   ├── common/                    # 공통 리소스
+│   │   │   ├── cm-common.yaml
+│   │   │   ├── secret-common.yaml
+│   │   │   ├── secret-imagepull.yaml
+│   │   │   └── ingress.yaml
+│   │   ├── user/                      # User 서비스
+│   │   │   ├── deployment.yaml
+│   │   │   ├── service.yaml
+│   │   │   └── secret-user.yaml
+│   │   ├── meeting/                   # Meeting 서비스
+│   │   ├── stt/                       # STT 서비스
+│   │   ├── ai/                        # AI 서비스
+│   │   ├── notification/              # Notification 서비스
+│   │   └── kustomization.yaml
+│   └── overlays/                      # 환경별 오버레이
+│       ├── dev/                       # 개발 환경
+│       │   ├── kustomization.yaml
+│       │   ├── cm-common-patch.yaml
+│       │   ├── secret-common-patch.yaml
+│       │   ├── ingress-patch.yaml
+│       │   ├── deployment-{service}-patch.yaml
+│       │   └── secret-{service}-patch.yaml
+│       ├── staging/                   # 스테이징 환경
+│       └── prod/                      # 프로덕션 환경
+├── config/                            # 환경별 설정
+│   ├── deploy_env_vars_dev
+│   ├── deploy_env_vars_staging
+│   └── deploy_env_vars_prod
+└── scripts/
+    └── deploy-actions.sh              # 수동 배포 스크립트
+```
+
+---
+
+## Kustomize 구조 설명
+
+### Base 구조
+
+Base는 모든 환경에서 공통으로 사용되는 기본 매니페스트입니다.
+
+**주요 리소스:**
+- **ConfigMap (cm-common)**: 환경 변수, 프로파일 설정
+- **Secret (secret-common)**: JWT 시크릿, Redis 패스워드
+- **Ingress**: API 라우팅 규칙
+- **Deployment**: 각 서비스별 배포 설정
+- **Service**: 각 서비스별 ClusterIP 서비스
+- **Secret**: 각 서비스별 데이터베이스 연결 정보
+
+### Overlay 구조
+
+각 환경(dev/staging/prod)별로 Base를 오버라이드합니다.
+
+#### DEV 환경
+- **Replicas**: 1
+- **Resources**: CPU 256m-1024m, Memory 256Mi-1024Mi
+- **Profile**: dev
+- **DDL**: update
+- **Log Level**: DEBUG
+- **Image Tag**: dev-{timestamp}
+
+#### STAGING 환경
+- **Replicas**: 2
+- **Resources**: CPU 512m-2048m, Memory 512Mi-2048Mi
+- **Profile**: staging
+- **DDL**: validate
+- **Log Level**: INFO
+- **Image Tag**: staging-{timestamp}
+- **SSL**: Enabled
+
+#### PROD 환경
+- **Replicas**: 3
+- **Resources**: CPU 1024m-4096m, Memory 1024Mi-4096Mi
+- **Profile**: prod
+- **DDL**: validate
+- **Log Level**: WARN
+- **JWT Expiration**: 짧게 설정 (보안 강화)
+- **Image Tag**: prod-{timestamp}
+- **SSL**: Enabled
+
+---
+
+## GitHub Actions 워크플로우
+
+### 트리거 조건
+
+1. **Push 이벤트**:
+   - 브랜치: `main`, `develop`
+   - 경로: 서비스 코드 변경 시 (`user/**`, `meeting/**` 등)
+
+2. **Pull Request**:
+   - 대상 브랜치: `main`
+
+3. **수동 실행 (workflow_dispatch)**:
+   - Environment 선택: dev/staging/prod
+   - SonarQube 분석 스킵 선택: true/false
+
+### 워크플로우 단계
+
+#### 1. Build Job
+1. 소스코드 체크아웃
+2. JDK 21 설정
+3. 환경 결정 (input 또는 기본값 dev)
+4. Gradle 빌드 (테스트 제외)
+5. SonarQube 분석 (선택적)
+6. 빌드 아티팩트 업로드
+7. 이미지 태그 생성 (타임스탬프 기반)
+
+#### 2. Release Job
+1. 빌드 아티팩트 다운로드
+2. Docker Buildx 설정
+3. Docker Hub 로그인 (Rate Limit 방지)
+4. ACR 로그인
+5. 각 서비스별 Docker 이미지 빌드 및 푸시
+
+#### 3. Deploy Job
+1. Azure CLI 설치 및 로그인
+2. kubectl 설정
+3. AKS Credentials 가져오기
+4. 네임스페이스 생성
+5. Kustomize 설치
+6. 이미지 태그 업데이트
+7. 매니페스트 적용
+8. Deployment Ready 대기
+
+---
+
+## 배포 방법
+
+### 1. 자동 배포 (Push/PR)
+
+코드를 `main` 또는 `develop` 브랜치에 push하면 자동으로 dev 환경에 배포됩니다.
+
+```bash
+git add .
+git commit -m "feat: 새로운 기능 추가"
+git push origin develop
+```
+
+### 2. 수동 배포 (GitHub Actions UI)
+
+1. GitHub Repository > Actions 탭 이동
+2. "Backend Services CI/CD" 워크플로우 선택
+3. "Run workflow" 버튼 클릭
+4. 환경 선택 (dev/staging/prod)
+5. SonarQube 분석 스킵 여부 선택
+6. "Run workflow" 실행
+
+### 3. 로컬에서 수동 배포
+
+```bash
+# 스크립트 실행 권한 확인
+chmod +x .github/scripts/deploy-actions.sh
+
+# DEV 환경에 배포 (기본)
+./.github/scripts/deploy-actions.sh dev latest
+
+# STAGING 환경에 특정 이미지 태그로 배포
+./.github/scripts/deploy-actions.sh staging 20250127120000
+
+# PROD 환경에 배포
+./.github/scripts/deploy-actions.sh prod 20250127120000
+```
+
+---
+
+## 롤백 방법
+
+### 1. GitHub Actions를 통한 롤백
+
+1. GitHub > Actions > 성공한 이전 워크플로우 선택
+2. "Re-run all jobs" 클릭
+3. 이전 버전으로 재배포됨
+
+### 2. kubectl을 이용한 롤백
+
+```bash
+# 특정 Revision으로 롤백
+kubectl rollout undo deployment/user -n hgzero --to-revision=2
+
+# 이전 버전으로 롤백
+kubectl rollout undo deployment/user -n hgzero
+
+# 롤백 상태 확인
+kubectl rollout status deployment/user -n hgzero
+
+# Rollout 히스토리 확인
+kubectl rollout history deployment/user -n hgzero
+```
+
+### 3. 수동 스크립트를 이용한 롤백
+
+```bash
+# 이전 안정 버전의 이미지 태그로 배포
+./.github/scripts/deploy-actions.sh dev 20250126110000
+```
+
+---
+
+## SonarQube 설정
+
+### 프로젝트 생성
+
+각 서비스별로 SonarQube 프로젝트를 생성하세요:
+- hgzero-user-dev
+- hgzero-meeting-dev
+- hgzero-stt-dev
+- hgzero-ai-dev
+- hgzero-notification-dev
+
+### Quality Gate 설정
+
+기본 Quality Gate 설정:
+- **Coverage**: >= 80%
+- **Duplicated Lines**: <= 3%
+- **Maintainability Rating**: <= A
+- **Reliability Rating**: <= A
+- **Security Rating**: <= A
+
+### Gradle 설정 (이미 구성됨)
+
+```gradle
+// build.gradle
+plugins {
+    id 'org.sonarqube' version '4.0.0.2929'
+    id 'jacoco'
+}
+
+sonarqube {
+    properties {
+        property "sonar.projectKey", "hgzero-${project.name}"
+        property "sonar.projectName", "hgzero-${project.name}"
+    }
+}
+
+jacocoTestReport {
+    reports {
+        xml.enabled true
+    }
+}
+```
+
+---
+
+## 트러블슈팅
+
+### 1. 이미지 Pull 실패
+
+**증상**: `ImagePullBackOff` 또는 `ErrImagePull`
+
+**해결 방법**:
+```bash
+# ACR 로그인 테스트
+az acr login --name acrdigitalgarage02
+
+# Image Pull Secret 재생성
+kubectl delete secret acr-secret -n hgzero
+kubectl create secret docker-registry acr-secret \
+  --docker-server=acrdigitalgarage02.azurecr.io \
+  --docker-username=acrdigitalgarage02 \
+  --docker-password={ACR_PASSWORD} \
+  -n hgzero
+```
+
+### 2. Deployment 타임아웃
+
+**증상**: `deployment "user" exceeded its progress deadline`
+
+**해결 방법**:
+```bash
+# Pod 상태 확인
+kubectl get pods -n hgzero
+
+# Pod 로그 확인
+kubectl logs -n hgzero {pod-name}
+
+# Events 확인
+kubectl describe pod -n hgzero {pod-name}
+```
+
+### 3. Health Check 실패
+
+**증상**: Deployment가 Ready 상태로 전환되지 않음
+
+**해결 방법**:
+```bash
+# Actuator health 엔드포인트 확인
+kubectl exec -n hgzero {pod-name} -- curl http://localhost:8080/actuator/health
+
+# 애플리케이션 로그 확인
+kubectl logs -n hgzero {pod-name} -f
+```
+
+### 4. Kustomize 빌드 오류
+
+**증상**: `kustomize build` 실패
+
+**해결 방법**:
+```bash
+# 로컬에서 Kustomize 검증
+kubectl kustomize .github/kustomize/overlays/dev
+
+# YAML 문법 검증
+yamllint .github/kustomize/overlays/dev/*.yaml
+```
+
+### 5. SonarQube 연결 실패
+
+**증상**: SonarQube Analysis 단계에서 연결 오류
+
+**해결 방법**:
+1. SONAR_HOST_URL이 올바른지 확인
+2. SONAR_TOKEN이 유효한지 확인
+3. SonarQube 서비스 상태 확인:
+   ```bash
+   kubectl get pods -n sonarqube
+   kubectl logs -n sonarqube {sonarqube-pod}
+   ```
+
+### 6. 환경 변수 로드 실패
+
+**증상**: 환경 설정 파일을 찾을 수 없음
+
+**해결 방법**:
+```bash
+# 파일 존재 확인
+ls -la .github/config/
+
+# 파일 내용 확인
+cat .github/config/deploy_env_vars_dev
+```
+
+---
+
+## 참고 자료
+
+- [Kustomize 공식 문서](https://kustomize.io/)
+- [GitHub Actions 문서](https://docs.github.com/en/actions)
+- [Azure Container Registry 문서](https://docs.microsoft.com/en-us/azure/container-registry/)
+- [AKS 문서](https://docs.microsoft.com/en-us/azure/aks/)
+- [SonarQube 문서](https://docs.sonarqube.org/)
+
+---
+
+## 문의 및 지원
+
+문제가 발생하거나 질문이 있으시면:
+1. GitHub Issues에 등록
+2. DevOps 팀에 문의 (송주영)
+3. Slack #devops 채널
+
+---
+
+**작성일**: 2025-01-27
+**작성자**: DevOps Team (주영)
+**버전**: 1.0.0
diff --git a/.github/config/deploy_env_vars_dev b/.github/config/deploy_env_vars_dev
new file mode 100644
index 0000000..e45920c
--- /dev/null
+++ b/.github/config/deploy_env_vars_dev
@@ -0,0 +1,3 @@
+# dev Environment Configuration
+resource_group=rg-digitalgarage-02
+cluster_name=aks-digitalgarage-02
diff --git a/.github/config/deploy_env_vars_prod b/.github/config/deploy_env_vars_prod
new file mode 100644
index 0000000..c2bdc92
--- /dev/null
+++ b/.github/config/deploy_env_vars_prod
@@ -0,0 +1,3 @@
+# prod Environment Configuration
+resource_group=rg-digitalgarage-02
+cluster_name=aks-digitalgarage-02
diff --git a/.github/config/deploy_env_vars_staging b/.github/config/deploy_env_vars_staging
new file mode 100644
index 0000000..5fa855c
--- /dev/null
+++ b/.github/config/deploy_env_vars_staging
@@ -0,0 +1,3 @@
+# staging Environment Configuration
+resource_group=rg-digitalgarage-02
+cluster_name=aks-digitalgarage-02
diff --git a/.github/kustomize/base/ai/deployment.yaml b/.github/kustomize/base/ai/deployment.yaml
new file mode 100644
index 0000000..2e41bc5
--- /dev/null
+++ b/.github/kustomize/base/ai/deployment.yaml
@@ -0,0 +1,66 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ai
+  labels:
+    app: ai
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: ai
+  template:
+    metadata:
+      labels:
+        app: ai
+    spec:
+      containers:
+      - name: ai
+        image: acrdigitalgarage02.azurecr.io/hgzero/ai:latest
+        ports:
+        - containerPort: 8080
+          protocol: TCP
+        envFrom:
+        - configMapRef:
+            name: cm-common
+        - secretRef:
+            name: secret-common
+        env:
+        - name: DB_URL
+          valueFrom:
+            secretKeyRef:
+              name: secret-ai
+              key: DB_URL
+        - name: DB_USERNAME
+          valueFrom:
+            secretKeyRef:
+              name: secret-ai
+              key: DB_USERNAME
+        - name: DB_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: secret-ai
+              key: DB_PASSWORD
+        resources:
+          requests:
+            cpu: 256m
+            memory: 256Mi
+          limits:
+            cpu: 1024m
+            memory: 1024Mi
+        livenessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 60
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
diff --git a/.github/kustomize/base/ai/secret-ai.yaml b/.github/kustomize/base/ai/secret-ai.yaml
new file mode 100644
index 0000000..7df0040
--- /dev/null
+++ b/.github/kustomize/base/ai/secret-ai.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-ai
+  labels:
+    app: ai
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-service:5432/aidb"
+  DB_USERNAME: "aiuser"
+  DB_PASSWORD: "aipass123"
diff --git a/.github/kustomize/base/ai/service.yaml b/.github/kustomize/base/ai/service.yaml
new file mode 100644
index 0000000..a287430
--- /dev/null
+++ b/.github/kustomize/base/ai/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: ai
+  labels:
+    app: ai
+spec:
+  type: ClusterIP
+  ports:
+  - port: 8080
+    targetPort: 8080
+    protocol: TCP
+    name: http
+  selector:
+    app: ai
diff --git a/.github/kustomize/base/common/cm-common.yaml b/.github/kustomize/base/common/cm-common.yaml
new file mode 100644
index 0000000..1525bfc
--- /dev/null
+++ b/.github/kustomize/base/common/cm-common.yaml
@@ -0,0 +1,25 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cm-common
+data:
+  # Spring Profiles
+  SPRING_PROFILES_ACTIVE: "dev"
+
+  # Database Configuration
+  DDL_AUTO: "update"
+  SHOW_SQL: "true"
+
+  # JWT Configuration
+  JWT_ACCESS_TOKEN_EXPIRATION: "3600000"    # 1 hour
+  JWT_REFRESH_TOKEN_EXPIRATION: "86400000"  # 24 hours
+
+  # Logging Configuration
+  LOG_LEVEL: "INFO"
+
+  # Application Configuration
+  SERVER_PORT: "8080"
+
+  # Redis Configuration
+  REDIS_HOST: "redis-service"
+  REDIS_PORT: "6379"
diff --git a/.github/kustomize/base/common/ingress.yaml b/.github/kustomize/base/common/ingress.yaml
new file mode 100644
index 0000000..6ac515e
--- /dev/null
+++ b/.github/kustomize/base/common/ingress.yaml
@@ -0,0 +1,48 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: hgzero
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+    nginx.ingress.kubernetes.io/ssl-redirect: "false"
+spec:
+  ingressClassName: nginx
+  rules:
+    - host: hgzero-api.20.214.196.128.nip.io
+      http:
+        paths:
+          - path: /api/users
+            pathType: Prefix
+            backend:
+              service:
+                name: user
+                port:
+                  number: 8080
+          - path: /api/meetings
+            pathType: Prefix
+            backend:
+              service:
+                name: meeting
+                port:
+                  number: 8080
+          - path: /api/stt
+            pathType: Prefix
+            backend:
+              service:
+                name: stt
+                port:
+                  number: 8080
+          - path: /api/ai
+            pathType: Prefix
+            backend:
+              service:
+                name: ai
+                port:
+                  number: 8080
+          - path: /api/notifications
+            pathType: Prefix
+            backend:
+              service:
+                name: notification
+                port:
+                  number: 8080
diff --git a/.github/kustomize/base/common/secret-common.yaml b/.github/kustomize/base/common/secret-common.yaml
new file mode 100644
index 0000000..1c231d0
--- /dev/null
+++ b/.github/kustomize/base/common/secret-common.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-common
+type: Opaque
+stringData:
+  # JWT Secret Key (Base64 encoded in production)
+  JWT_SECRET_KEY: "hgzero-jwt-secret-key-change-in-production"
+
+  # Redis Password
+  REDIS_PASSWORD: "redis-password-change-in-production"
diff --git a/.github/kustomize/base/common/secret-imagepull.yaml b/.github/kustomize/base/common/secret-imagepull.yaml
new file mode 100644
index 0000000..0a4ff55
--- /dev/null
+++ b/.github/kustomize/base/common/secret-imagepull.yaml
@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: acr-secret
+type: kubernetes.io/dockerconfigjson
+data:
+  .dockerconfigjson: e30K
diff --git a/.github/kustomize/base/kustomization.yaml b/.github/kustomize/base/kustomization.yaml
new file mode 100644
index 0000000..076e551
--- /dev/null
+++ b/.github/kustomize/base/kustomization.yaml
@@ -0,0 +1,49 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+metadata:
+  name: hgzero-base
+
+resources:
+  # Common resources
+  - common/cm-common.yaml
+  - common/secret-common.yaml
+  - common/secret-imagepull.yaml
+  - common/ingress.yaml
+
+  # User service
+  - user/deployment.yaml
+  - user/service.yaml
+  - user/secret-user.yaml
+
+  # Meeting service
+  - meeting/deployment.yaml
+  - meeting/service.yaml
+  - meeting/secret-meeting.yaml
+
+  # STT service
+  - stt/deployment.yaml
+  - stt/service.yaml
+  - stt/secret-stt.yaml
+
+  # AI service
+  - ai/deployment.yaml
+  - ai/service.yaml
+  - ai/secret-ai.yaml
+
+  # Notification service
+  - notification/deployment.yaml
+  - notification/service.yaml
+  - notification/secret-notification.yaml
+
+images:
+  - name: acrdigitalgarage02.azurecr.io/hgzero/user
+    newTag: latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/meeting
+    newTag: latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/stt
+    newTag: latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/ai
+    newTag: latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/notification
+    newTag: latest
diff --git a/.github/kustomize/base/meeting/deployment.yaml b/.github/kustomize/base/meeting/deployment.yaml
new file mode 100644
index 0000000..cdafa45
--- /dev/null
+++ b/.github/kustomize/base/meeting/deployment.yaml
@@ -0,0 +1,66 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: meeting
+  labels:
+    app: meeting
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: meeting
+  template:
+    metadata:
+      labels:
+        app: meeting
+    spec:
+      containers:
+      - name: meeting
+        image: acrdigitalgarage02.azurecr.io/hgzero/meeting:latest
+        ports:
+        - containerPort: 8080
+          protocol: TCP
+        envFrom:
+        - configMapRef:
+            name: cm-common
+        - secretRef:
+            name: secret-common
+        env:
+        - name: DB_URL
+          valueFrom:
+            secretKeyRef:
+              name: secret-meeting
+              key: DB_URL
+        - name: DB_USERNAME
+          valueFrom:
+            secretKeyRef:
+              name: secret-meeting
+              key: DB_USERNAME
+        - name: DB_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: secret-meeting
+              key: DB_PASSWORD
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
+        livenessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 10
+          periodSeconds: 5
+          timeoutSeconds: 3
+          failureThreshold: 3
diff --git a/.github/kustomize/base/meeting/secret-meeting.yaml b/.github/kustomize/base/meeting/secret-meeting.yaml
new file mode 100644
index 0000000..c2a4084
--- /dev/null
+++ b/.github/kustomize/base/meeting/secret-meeting.yaml
@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-meeting
+type: Opaque
+stringData:
+  # Meeting Service Database Configuration (Development)
+  DB_URL: "jdbc:postgresql://postgres-meeting:5432/meeting"
+  DB_USERNAME: "meeting_user"
+  DB_PASSWORD: "meeting_password"
diff --git a/.github/kustomize/base/meeting/service.yaml b/.github/kustomize/base/meeting/service.yaml
new file mode 100644
index 0000000..1200fb7
--- /dev/null
+++ b/.github/kustomize/base/meeting/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: meeting
+  labels:
+    app: meeting
+spec:
+  type: ClusterIP
+  selector:
+    app: meeting
+  ports:
+  - port: 8080
+    targetPort: 8080
+    protocol: TCP
+    name: http
diff --git a/.github/kustomize/base/notification/deployment.yaml b/.github/kustomize/base/notification/deployment.yaml
new file mode 100644
index 0000000..080e70c
--- /dev/null
+++ b/.github/kustomize/base/notification/deployment.yaml
@@ -0,0 +1,68 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: notification
+  labels:
+    app: notification
+    system: hgzero
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: notification
+  template:
+    metadata:
+      labels:
+        app: notification
+        system: hgzero
+    spec:
+      containers:
+      - name: notification
+        image: acrdigitalgarage02.azurecr.io/hgzero/notification:latest
+        ports:
+        - containerPort: 8080
+          protocol: TCP
+        envFrom:
+        - configMapRef:
+            name: cm-common
+        - secretRef:
+            name: secret-common
+        env:
+        - name: DB_URL
+          valueFrom:
+            secretKeyRef:
+              name: secret-notification
+              key: DB_URL
+        - name: DB_USERNAME
+          valueFrom:
+            secretKeyRef:
+              name: secret-notification
+              key: DB_USERNAME
+        - name: DB_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: secret-notification
+              key: DB_PASSWORD
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
+        livenessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 60
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
diff --git a/.github/kustomize/base/notification/secret-notification.yaml b/.github/kustomize/base/notification/secret-notification.yaml
new file mode 100644
index 0000000..6c5cfa2
--- /dev/null
+++ b/.github/kustomize/base/notification/secret-notification.yaml
@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-notification
+  labels:
+    app: notification
+    system: hgzero
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-service:5432/notification_db"
+  DB_USERNAME: "notification_user"
+  DB_PASSWORD: "notification_pass"
diff --git a/.github/kustomize/base/notification/service.yaml b/.github/kustomize/base/notification/service.yaml
new file mode 100644
index 0000000..d123457
--- /dev/null
+++ b/.github/kustomize/base/notification/service.yaml
@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: notification
+  labels:
+    app: notification
+    system: hgzero
+spec:
+  type: ClusterIP
+  selector:
+    app: notification
+  ports:
+  - port: 8080
+    targetPort: 8080
+    protocol: TCP
+    name: http
diff --git a/.github/kustomize/base/stt/deployment.yaml b/.github/kustomize/base/stt/deployment.yaml
new file mode 100644
index 0000000..b14c27c
--- /dev/null
+++ b/.github/kustomize/base/stt/deployment.yaml
@@ -0,0 +1,66 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: stt
+  labels:
+    app: stt
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: stt
+  template:
+    metadata:
+      labels:
+        app: stt
+    spec:
+      containers:
+      - name: stt
+        image: acrdigitalgarage02.azurecr.io/hgzero/stt:latest
+        ports:
+        - containerPort: 8080
+          protocol: TCP
+        envFrom:
+        - configMapRef:
+            name: cm-common
+        - secretRef:
+            name: secret-common
+        env:
+        - name: DB_URL
+          valueFrom:
+            secretKeyRef:
+              name: secret-stt
+              key: DB_URL
+        - name: DB_USERNAME
+          valueFrom:
+            secretKeyRef:
+              name: secret-stt
+              key: DB_USERNAME
+        - name: DB_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: secret-stt
+              key: DB_PASSWORD
+        resources:
+          requests:
+            cpu: 256m
+            memory: 256Mi
+          limits:
+            cpu: 1024m
+            memory: 1024Mi
+        livenessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 20
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
diff --git a/.github/kustomize/base/stt/secret-stt.yaml b/.github/kustomize/base/stt/secret-stt.yaml
new file mode 100644
index 0000000..0d8825a
--- /dev/null
+++ b/.github/kustomize/base/stt/secret-stt.yaml
@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-stt
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-service:5432/sttdb"
+  DB_USERNAME: "sttuser"
+  DB_PASSWORD: "sttpass"
diff --git a/.github/kustomize/base/stt/service.yaml b/.github/kustomize/base/stt/service.yaml
new file mode 100644
index 0000000..29c99d0
--- /dev/null
+++ b/.github/kustomize/base/stt/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: stt
+  labels:
+    app: stt
+spec:
+  type: ClusterIP
+  selector:
+    app: stt
+  ports:
+  - port: 8080
+    targetPort: 8080
+    protocol: TCP
+    name: http
diff --git a/.github/kustomize/base/user/deployment.yaml b/.github/kustomize/base/user/deployment.yaml
new file mode 100644
index 0000000..21d1469
--- /dev/null
+++ b/.github/kustomize/base/user/deployment.yaml
@@ -0,0 +1,66 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: user
+  labels:
+    app: user
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: user
+  template:
+    metadata:
+      labels:
+        app: user
+    spec:
+      containers:
+      - name: user
+        image: acrdigitalgarage02.azurecr.io/hgzero/user:latest
+        ports:
+        - containerPort: 8080
+          protocol: TCP
+        envFrom:
+        - configMapRef:
+            name: cm-common
+        - secretRef:
+            name: secret-common
+        env:
+        - name: DB_URL
+          valueFrom:
+            secretKeyRef:
+              name: secret-user
+              key: DB_URL
+        - name: DB_USERNAME
+          valueFrom:
+            secretKeyRef:
+              name: secret-user
+              key: DB_USERNAME
+        - name: DB_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: secret-user
+              key: DB_PASSWORD
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
+        livenessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /actuator/health
+            port: 8080
+          initialDelaySeconds: 10
+          periodSeconds: 5
+          timeoutSeconds: 3
+          failureThreshold: 3
diff --git a/.github/kustomize/base/user/secret-user.yaml b/.github/kustomize/base/user/secret-user.yaml
new file mode 100644
index 0000000..8dcd240
--- /dev/null
+++ b/.github/kustomize/base/user/secret-user.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-user
+  labels:
+    app: user
+type: Opaque
+stringData:
+  DB_URL: "jdbc:mysql://mysql-user:3306/userdb?useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true"
+  DB_USERNAME: "user"
+  DB_PASSWORD: "user1234"
diff --git a/.github/kustomize/base/user/service.yaml b/.github/kustomize/base/user/service.yaml
new file mode 100644
index 0000000..4e32d39
--- /dev/null
+++ b/.github/kustomize/base/user/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: user
+  labels:
+    app: user
+spec:
+  type: ClusterIP
+  selector:
+    app: user
+  ports:
+  - port: 8080
+    targetPort: 8080
+    protocol: TCP
+    name: http
diff --git a/.github/kustomize/overlays/dev/cm-common-patch.yaml b/.github/kustomize/overlays/dev/cm-common-patch.yaml
new file mode 100644
index 0000000..4047dd8
--- /dev/null
+++ b/.github/kustomize/overlays/dev/cm-common-patch.yaml
@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cm-common
+data:
+  # Spring Profiles
+  SPRING_PROFILES_ACTIVE: "dev"
+
+  # Database Configuration
+  DDL_AUTO: "update"
+  SHOW_SQL: "true"
+
+  # JWT Configuration
+  JWT_ACCESS_TOKEN_EXPIRATION: "3600000"    # 1 hour
+  JWT_REFRESH_TOKEN_EXPIRATION: "86400000"  # 24 hours
+
+  # Logging Configuration
+  LOG_LEVEL: "DEBUG"
diff --git a/.github/kustomize/overlays/dev/deployment-ai-patch.yaml b/.github/kustomize/overlays/dev/deployment-ai-patch.yaml
new file mode 100644
index 0000000..5c37383
--- /dev/null
+++ b/.github/kustomize/overlays/dev/deployment-ai-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ai
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: ai
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
diff --git a/.github/kustomize/overlays/dev/deployment-meeting-patch.yaml b/.github/kustomize/overlays/dev/deployment-meeting-patch.yaml
new file mode 100644
index 0000000..797ff08
--- /dev/null
+++ b/.github/kustomize/overlays/dev/deployment-meeting-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: meeting
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: meeting
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
diff --git a/.github/kustomize/overlays/dev/deployment-notification-patch.yaml b/.github/kustomize/overlays/dev/deployment-notification-patch.yaml
new file mode 100644
index 0000000..ed4cea8
--- /dev/null
+++ b/.github/kustomize/overlays/dev/deployment-notification-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: notification
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: notification
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
diff --git a/.github/kustomize/overlays/dev/deployment-stt-patch.yaml b/.github/kustomize/overlays/dev/deployment-stt-patch.yaml
new file mode 100644
index 0000000..f9ad444
--- /dev/null
+++ b/.github/kustomize/overlays/dev/deployment-stt-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: stt
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: stt
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
diff --git a/.github/kustomize/overlays/dev/deployment-user-patch.yaml b/.github/kustomize/overlays/dev/deployment-user-patch.yaml
new file mode 100644
index 0000000..1db2284
--- /dev/null
+++ b/.github/kustomize/overlays/dev/deployment-user-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: user
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: user
+        resources:
+          requests:
+            cpu: "256m"
+            memory: "256Mi"
+          limits:
+            cpu: "1024m"
+            memory: "1024Mi"
diff --git a/.github/kustomize/overlays/dev/ingress-patch.yaml b/.github/kustomize/overlays/dev/ingress-patch.yaml
new file mode 100644
index 0000000..6ac515e
--- /dev/null
+++ b/.github/kustomize/overlays/dev/ingress-patch.yaml
@@ -0,0 +1,48 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: hgzero
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+    nginx.ingress.kubernetes.io/ssl-redirect: "false"
+spec:
+  ingressClassName: nginx
+  rules:
+    - host: hgzero-api.20.214.196.128.nip.io
+      http:
+        paths:
+          - path: /api/users
+            pathType: Prefix
+            backend:
+              service:
+                name: user
+                port:
+                  number: 8080
+          - path: /api/meetings
+            pathType: Prefix
+            backend:
+              service:
+                name: meeting
+                port:
+                  number: 8080
+          - path: /api/stt
+            pathType: Prefix
+            backend:
+              service:
+                name: stt
+                port:
+                  number: 8080
+          - path: /api/ai
+            pathType: Prefix
+            backend:
+              service:
+                name: ai
+                port:
+                  number: 8080
+          - path: /api/notifications
+            pathType: Prefix
+            backend:
+              service:
+                name: notification
+                port:
+                  number: 8080
diff --git a/.github/kustomize/overlays/dev/kustomization.yaml b/.github/kustomize/overlays/dev/kustomization.yaml
new file mode 100644
index 0000000..edb6bc5
--- /dev/null
+++ b/.github/kustomize/overlays/dev/kustomization.yaml
@@ -0,0 +1,84 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: hgzero
+
+resources:
+  - ../../base
+
+patches:
+  # Common patches
+  - path: cm-common-patch.yaml
+    target:
+      kind: ConfigMap
+      name: cm-common
+  - path: secret-common-patch.yaml
+    target:
+      kind: Secret
+      name: secret-common
+  - path: ingress-patch.yaml
+    target:
+      kind: Ingress
+      name: hgzero
+
+  # User service patches
+  - path: deployment-user-patch.yaml
+    target:
+      kind: Deployment
+      name: user
+  - path: secret-user-patch.yaml
+    target:
+      kind: Secret
+      name: secret-user
+
+  # Meeting service patches
+  - path: deployment-meeting-patch.yaml
+    target:
+      kind: Deployment
+      name: meeting
+  - path: secret-meeting-patch.yaml
+    target:
+      kind: Secret
+      name: secret-meeting
+
+  # STT service patches
+  - path: deployment-stt-patch.yaml
+    target:
+      kind: Deployment
+      name: stt
+  - path: secret-stt-patch.yaml
+    target:
+      kind: Secret
+      name: secret-stt
+
+  # AI service patches
+  - path: deployment-ai-patch.yaml
+    target:
+      kind: Deployment
+      name: ai
+  - path: secret-ai-patch.yaml
+    target:
+      kind: Secret
+      name: secret-ai
+
+  # Notification service patches
+  - path: deployment-notification-patch.yaml
+    target:
+      kind: Deployment
+      name: notification
+  - path: secret-notification-patch.yaml
+    target:
+      kind: Secret
+      name: secret-notification
+
+images:
+  - name: acrdigitalgarage02.azurecr.io/hgzero/user
+    newTag: dev-latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/meeting
+    newTag: dev-latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/stt
+    newTag: dev-latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/ai
+    newTag: dev-latest
+  - name: acrdigitalgarage02.azurecr.io/hgzero/notification
+    newTag: dev-latest
diff --git a/.github/kustomize/overlays/dev/secret-ai-patch.yaml b/.github/kustomize/overlays/dev/secret-ai-patch.yaml
new file mode 100644
index 0000000..e99705c
--- /dev/null
+++ b/.github/kustomize/overlays/dev/secret-ai-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-ai
+  labels:
+    app: ai
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-service-dev:5432/aidb_dev"
+  DB_USERNAME: "aiuser_dev"
+  DB_PASSWORD: "aipass_dev123"
diff --git a/.github/kustomize/overlays/dev/secret-common-patch.yaml b/.github/kustomize/overlays/dev/secret-common-patch.yaml
new file mode 100644
index 0000000..7ec3e2f
--- /dev/null
+++ b/.github/kustomize/overlays/dev/secret-common-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-common
+type: Opaque
+stringData:
+  # JWT Secret Key (개발용)
+  JWT_SECRET_KEY: "hgzero-jwt-secret-key-change-in-production"
+
+  # Redis Password (개발용)
+  REDIS_PASSWORD: "redis-password-change-in-production"
diff --git a/.github/kustomize/overlays/dev/secret-meeting-patch.yaml b/.github/kustomize/overlays/dev/secret-meeting-patch.yaml
new file mode 100644
index 0000000..aa64ac7
--- /dev/null
+++ b/.github/kustomize/overlays/dev/secret-meeting-patch.yaml
@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-meeting
+type: Opaque
+stringData:
+  # Meeting Service Database Configuration (Development)
+  DB_URL: "jdbc:postgresql://postgres-meeting-dev:5432/meeting_dev"
+  DB_USERNAME: "meeting_dev_user"
+  DB_PASSWORD: "meeting_dev_password"
diff --git a/.github/kustomize/overlays/dev/secret-notification-patch.yaml b/.github/kustomize/overlays/dev/secret-notification-patch.yaml
new file mode 100644
index 0000000..36a7b59
--- /dev/null
+++ b/.github/kustomize/overlays/dev/secret-notification-patch.yaml
@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-notification
+  labels:
+    app: notification
+    system: hgzero
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-service-dev:5432/notification_db_dev"
+  DB_USERNAME: "notification_dev_user"
+  DB_PASSWORD: "notification_dev_pass"
diff --git a/.github/kustomize/overlays/dev/secret-stt-patch.yaml b/.github/kustomize/overlays/dev/secret-stt-patch.yaml
new file mode 100644
index 0000000..1d0c9e6
--- /dev/null
+++ b/.github/kustomize/overlays/dev/secret-stt-patch.yaml
@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-stt
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-service-dev:5432/sttdb_dev"
+  DB_USERNAME: "sttuser_dev"
+  DB_PASSWORD: "sttpass_dev"
diff --git a/.github/kustomize/overlays/dev/secret-user-patch.yaml b/.github/kustomize/overlays/dev/secret-user-patch.yaml
new file mode 100644
index 0000000..be99004
--- /dev/null
+++ b/.github/kustomize/overlays/dev/secret-user-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-user
+  labels:
+    app: user
+type: Opaque
+stringData:
+  DB_URL: "jdbc:mysql://mysql-user-dev:3306/userdb_dev?useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true"
+  DB_USERNAME: "user_dev"
+  DB_PASSWORD: "user_dev1234"
diff --git a/.github/kustomize/overlays/prod/cm-common-patch.yaml b/.github/kustomize/overlays/prod/cm-common-patch.yaml
new file mode 100644
index 0000000..5874c91
--- /dev/null
+++ b/.github/kustomize/overlays/prod/cm-common-patch.yaml
@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: common-config
+  namespace: hgzero
+data:
+  SPRING_PROFILES_ACTIVE: "prod"
+  DDL_AUTO: "validate"
+  LOG_LEVEL: "WARN"
+  JWT_ACCESS_TOKEN_EXPIRATION: "1800000"
+  JWT_REFRESH_TOKEN_EXPIRATION: "43200000"
+  REDIS_HOST: "redis-svc.hgzero.svc.cluster.local"
+  REDIS_PORT: "6379"
+  KAFKA_BOOTSTRAP_SERVERS: "kafka-svc.hgzero.svc.cluster.local:9092"
diff --git a/.github/kustomize/overlays/prod/deployment-ai-patch.yaml b/.github/kustomize/overlays/prod/deployment-ai-patch.yaml
new file mode 100644
index 0000000..7fa27c9
--- /dev/null
+++ b/.github/kustomize/overlays/prod/deployment-ai-patch.yaml
@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ai-deploy
+  namespace: hgzero
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+        - name: ai-container
+          resources:
+            requests:
+              cpu: "1024m"
+              memory: "1024Mi"
+            limits:
+              cpu: "4096m"
+              memory: "4096Mi"
diff --git a/.github/kustomize/overlays/prod/deployment-meeting-patch.yaml b/.github/kustomize/overlays/prod/deployment-meeting-patch.yaml
new file mode 100644
index 0000000..11fcfeb
--- /dev/null
+++ b/.github/kustomize/overlays/prod/deployment-meeting-patch.yaml
@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: meeting-deploy
+  namespace: hgzero
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+        - name: meeting-container
+          resources:
+            requests:
+              cpu: "1024m"
+              memory: "1024Mi"
+            limits:
+              cpu: "4096m"
+              memory: "4096Mi"
diff --git a/.github/kustomize/overlays/prod/deployment-notification-patch.yaml b/.github/kustomize/overlays/prod/deployment-notification-patch.yaml
new file mode 100644
index 0000000..b832ef2
--- /dev/null
+++ b/.github/kustomize/overlays/prod/deployment-notification-patch.yaml
@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: notification-deploy
+  namespace: hgzero
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+        - name: notification-container
+          resources:
+            requests:
+              cpu: "1024m"
+              memory: "1024Mi"
+            limits:
+              cpu: "4096m"
+              memory: "4096Mi"
diff --git a/.github/kustomize/overlays/prod/deployment-stt-patch.yaml b/.github/kustomize/overlays/prod/deployment-stt-patch.yaml
new file mode 100644
index 0000000..1dc8fb7
--- /dev/null
+++ b/.github/kustomize/overlays/prod/deployment-stt-patch.yaml
@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: stt-deploy
+  namespace: hgzero
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+        - name: stt-container
+          resources:
+            requests:
+              cpu: "1024m"
+              memory: "1024Mi"
+            limits:
+              cpu: "4096m"
+              memory: "4096Mi"
diff --git a/.github/kustomize/overlays/prod/deployment-user-patch.yaml b/.github/kustomize/overlays/prod/deployment-user-patch.yaml
new file mode 100644
index 0000000..5eddde0
--- /dev/null
+++ b/.github/kustomize/overlays/prod/deployment-user-patch.yaml
@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: user-deploy
+  namespace: hgzero
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+        - name: user-container
+          resources:
+            requests:
+              cpu: "1024m"
+              memory: "1024Mi"
+            limits:
+              cpu: "4096m"
+              memory: "4096Mi"
diff --git a/.github/kustomize/overlays/prod/ingress-patch.yaml b/.github/kustomize/overlays/prod/ingress-patch.yaml
new file mode 100644
index 0000000..96b2659
--- /dev/null
+++ b/.github/kustomize/overlays/prod/ingress-patch.yaml
@@ -0,0 +1,49 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: hgzero-ingress
+  namespace: hgzero
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /$2
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+spec:
+  ingressClassName: nginx
+  rules:
+    - host: hgzero-api.example.com
+      http:
+        paths:
+          - path: /user(/|$)(.*)
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: user-svc
+                port:
+                  number: 8080
+          - path: /meeting(/|$)(.*)
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: meeting-svc
+                port:
+                  number: 8081
+          - path: /stt(/|$)(.*)
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: stt-svc
+                port:
+                  number: 8082
+          - path: /ai(/|$)(.*)
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: ai-svc
+                port:
+                  number: 8083
+          - path: /notification(/|$)(.*)
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: notification-svc
+                port:
+                  number: 8084
diff --git a/.github/kustomize/overlays/prod/kustomization.yaml b/.github/kustomize/overlays/prod/kustomization.yaml
new file mode 100644
index 0000000..134c306
--- /dev/null
+++ b/.github/kustomize/overlays/prod/kustomization.yaml
@@ -0,0 +1,84 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: hgzero
+
+bases:
+  - ../../base
+
+patches:
+  # Common patches
+  - path: cm-common-patch.yaml
+    target:
+      kind: ConfigMap
+      name: common-config
+  - path: secret-common-patch.yaml
+    target:
+      kind: Secret
+      name: common-secret
+  - path: ingress-patch.yaml
+    target:
+      kind: Ingress
+      name: hgzero-ingress
+
+  # User service patches
+  - path: deployment-user-patch.yaml
+    target:
+      kind: Deployment
+      name: user-deploy
+  - path: secret-user-patch.yaml
+    target:
+      kind: Secret
+      name: user-secret
+
+  # Meeting service patches
+  - path: deployment-meeting-patch.yaml
+    target:
+      kind: Deployment
+      name: meeting-deploy
+  - path: secret-meeting-patch.yaml
+    target:
+      kind: Secret
+      name: meeting-secret
+
+  # STT service patches
+  - path: deployment-stt-patch.yaml
+    target:
+      kind: Deployment
+      name: stt-deploy
+  - path: secret-stt-patch.yaml
+    target:
+      kind: Secret
+      name: stt-secret
+
+  # AI service patches
+  - path: deployment-ai-patch.yaml
+    target:
+      kind: Deployment
+      name: ai-deploy
+  - path: secret-ai-patch.yaml
+    target:
+      kind: Secret
+      name: ai-secret
+
+  # Notification service patches
+  - path: deployment-notification-patch.yaml
+    target:
+      kind: Deployment
+      name: notification-deploy
+  - path: secret-notification-patch.yaml
+    target:
+      kind: Secret
+      name: notification-secret
+
+images:
+  - name: user-service
+    newTag: prod-latest
+  - name: meeting-service
+    newTag: prod-latest
+  - name: stt-service
+    newTag: prod-latest
+  - name: ai-service
+    newTag: prod-latest
+  - name: notification-service
+    newTag: prod-latest
diff --git a/.github/kustomize/overlays/prod/secret-ai-patch.yaml b/.github/kustomize/overlays/prod/secret-ai-patch.yaml
new file mode 100644
index 0000000..bf17d50
--- /dev/null
+++ b/.github/kustomize/overlays/prod/secret-ai-patch.yaml
@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: ai-secret
+  namespace: hgzero
+type: Opaque
+stringData:
+  OPENAI_API_KEY: "your-openai-api-key"
+  LANGCHAIN_API_KEY: "your-langchain-api-key"
diff --git a/.github/kustomize/overlays/prod/secret-common-patch.yaml b/.github/kustomize/overlays/prod/secret-common-patch.yaml
new file mode 100644
index 0000000..5d14280
--- /dev/null
+++ b/.github/kustomize/overlays/prod/secret-common-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: common-secret
+  namespace: hgzero
+type: Opaque
+stringData:
+  JWT_SECRET_KEY: "your-prod-secret-key-change-this-in-production"
+  REDIS_PASSWORD: "your-prod-redis-password"
+  KAFKA_USERNAME: "admin"
+  KAFKA_PASSWORD: "admin-secret"
diff --git a/.github/kustomize/overlays/prod/secret-meeting-patch.yaml b/.github/kustomize/overlays/prod/secret-meeting-patch.yaml
new file mode 100644
index 0000000..5ad2f33
--- /dev/null
+++ b/.github/kustomize/overlays/prod/secret-meeting-patch.yaml
@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: meeting-secret
+  namespace: hgzero
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-prod:5432/meeting_prod"
+  DB_USERNAME: "meeting_admin"
+  DB_PASSWORD: "meeting_prod_password"
+  OPENAI_API_KEY: "your-openai-api-key"
+  S3_ACCESS_KEY: "your-s3-access-key"
+  S3_SECRET_KEY: "your-s3-secret-key"
diff --git a/.github/kustomize/overlays/prod/secret-notification-patch.yaml b/.github/kustomize/overlays/prod/secret-notification-patch.yaml
new file mode 100644
index 0000000..22f448b
--- /dev/null
+++ b/.github/kustomize/overlays/prod/secret-notification-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: notification-secret
+  namespace: hgzero
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-prod:5432/notification_prod"
+  DB_USERNAME: "notification_admin"
+  DB_PASSWORD: "notification_prod_password"
+  OPENAI_API_KEY: "your-openai-api-key"
diff --git a/.github/kustomize/overlays/prod/secret-stt-patch.yaml b/.github/kustomize/overlays/prod/secret-stt-patch.yaml
new file mode 100644
index 0000000..acc37b7
--- /dev/null
+++ b/.github/kustomize/overlays/prod/secret-stt-patch.yaml
@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: stt-secret
+  namespace: hgzero
+type: Opaque
+stringData:
+  OPENAI_API_KEY: "your-openai-api-key"
+  S3_ACCESS_KEY: "your-s3-access-key"
+  S3_SECRET_KEY: "your-s3-secret-key"
diff --git a/.github/kustomize/overlays/prod/secret-user-patch.yaml b/.github/kustomize/overlays/prod/secret-user-patch.yaml
new file mode 100644
index 0000000..2f14bb1
--- /dev/null
+++ b/.github/kustomize/overlays/prod/secret-user-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: user-secret
+  namespace: hgzero
+type: Opaque
+stringData:
+  DB_URL: "jdbc:postgresql://postgres-prod:5432/user_prod"
+  DB_USERNAME: "user_admin"
+  DB_PASSWORD: "user_prod_password"
+  OPENAI_API_KEY: "your-openai-api-key"
diff --git a/.github/kustomize/overlays/staging/README.md b/.github/kustomize/overlays/staging/README.md
new file mode 100644
index 0000000..5c034eb
--- /dev/null
+++ b/.github/kustomize/overlays/staging/README.md
@@ -0,0 +1,99 @@
+# STAGING Environment Kustomize Overlay
+
+## 개요
+STAGING 환경을 위한 Kustomize overlay 설정입니다.
+
+## 환경 설정
+
+### 네임스페이스
+- `hgzero`
+
+### 공통 설정
+- **프로파일**: staging
+- **DDL 모드**: validate
+- **로그 레벨**: INFO
+- **Ingress 호스트**: hgzero-staging-api.example.com
+- **SSL 리다이렉트**: 활성화
+
+### 리소스 설정
+- **Replicas**: 2
+- **Resource Requests**:
+  - CPU: 512m
+  - Memory: 512Mi
+- **Resource Limits**:
+  - CPU: 2048m
+  - Memory: 2048Mi
+
+## 생성된 파일 목록 (총 14개)
+
+### Common Patches (3개)
+1. `cm-common-patch.yaml` - 공통 ConfigMap 패치
+2. `secret-common-patch.yaml` - 공통 Secret 패치 (JWT, Redis)
+3. `ingress-patch.yaml` - Ingress 패치 (호스트, SSL)
+
+### Service-specific Patches (10개)
+각 서비스(user, meeting, stt, ai, notification)별 2개 파일:
+- `deployment-{서비스명}-patch.yaml` - Deployment 리소스 패치
+- `secret-{서비스명}-patch.yaml` - DB 연결 정보 패치
+
+4. `deployment-user-patch.yaml`
+5. `secret-user-patch.yaml`
+6. `deployment-meeting-patch.yaml`
+7. `secret-meeting-patch.yaml`
+8. `deployment-stt-patch.yaml`
+9. `secret-stt-patch.yaml`
+10. `deployment-ai-patch.yaml`
+11. `secret-ai-patch.yaml`
+12. `deployment-notification-patch.yaml`
+13. `secret-notification-patch.yaml`
+
+### Kustomization (1개)
+14. `kustomization.yaml` - Kustomize 설정 파일
+
+## 데이터베이스 설정
+
+각 서비스별 STAGING 환경 DB 정보:
+- **호스트**: {서비스명}-db-staging
+- **포트**: 5432
+- **데이터베이스명**: {서비스명}_db_staging
+- **사용자명**: {서비스명}_service
+- **비밀번호**: stringData로 정의 (실제 환경에서 변경 필요)
+
+## 이미지 태그
+모든 서비스: `staging-latest`
+
+## 사용 방법
+
+### 1. Kustomize 빌드 확인
+```bash
+kubectl kustomize .github/kustomize/overlays/staging
+```
+
+### 2. STAGING 환경 배포
+```bash
+kubectl apply -k .github/kustomize/overlays/staging
+```
+
+### 3. 배포 상태 확인
+```bash
+kubectl get all -n hgzero
+```
+
+### 4. Secret 업데이트 (실제 배포 시)
+```bash
+# Secret 파일들의 stringData를 실제 STAGING 환경 값으로 변경
+vi .github/kustomize/overlays/staging/secret-common-patch.yaml
+vi .github/kustomize/overlays/staging/secret-user-patch.yaml
+# ... (각 서비스별 secret 파일 수정)
+```
+
+## 주의사항
+1. Secret 파일들의 비밀번호는 반드시 실제 환경에 맞게 변경해야 합니다
+2. Ingress 호스트명을 실제 STAGING 도메인으로 변경해야 합니다
+3. DB 호스트명이 실제 STAGING 환경과 일치하는지 확인해야 합니다
+4. 리소스 제한은 실제 부하 테스트 결과에 따라 조정이 필요할 수 있습니다
+
+## 다음 단계
+- PROD 환경 overlay 생성
+- CI/CD 파이프라인과 통합
+- Monitoring 및 Logging 설정 추가
diff --git a/.github/kustomize/overlays/staging/cm-common-patch.yaml b/.github/kustomize/overlays/staging/cm-common-patch.yaml
new file mode 100644
index 0000000..c859d70
--- /dev/null
+++ b/.github/kustomize/overlays/staging/cm-common-patch.yaml
@@ -0,0 +1,8 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: hgzero-common-config
+data:
+  SPRING_PROFILES_ACTIVE: "staging"
+  DDL_AUTO: "validate"
+  LOG_LEVEL: "INFO"
diff --git a/.github/kustomize/overlays/staging/deployment-ai-patch.yaml b/.github/kustomize/overlays/staging/deployment-ai-patch.yaml
new file mode 100644
index 0000000..f63445c
--- /dev/null
+++ b/.github/kustomize/overlays/staging/deployment-ai-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ai-service
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+      - name: ai-service
+        resources:
+          requests:
+            memory: "512Mi"
+            cpu: "512m"
+          limits:
+            memory: "2048Mi"
+            cpu: "2048m"
diff --git a/.github/kustomize/overlays/staging/deployment-meeting-patch.yaml b/.github/kustomize/overlays/staging/deployment-meeting-patch.yaml
new file mode 100644
index 0000000..0976b94
--- /dev/null
+++ b/.github/kustomize/overlays/staging/deployment-meeting-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: meeting-service
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+      - name: meeting-service
+        resources:
+          requests:
+            memory: "512Mi"
+            cpu: "512m"
+          limits:
+            memory: "2048Mi"
+            cpu: "2048m"
diff --git a/.github/kustomize/overlays/staging/deployment-notification-patch.yaml b/.github/kustomize/overlays/staging/deployment-notification-patch.yaml
new file mode 100644
index 0000000..e4b04c1
--- /dev/null
+++ b/.github/kustomize/overlays/staging/deployment-notification-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: notification-service
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+      - name: notification-service
+        resources:
+          requests:
+            memory: "512Mi"
+            cpu: "512m"
+          limits:
+            memory: "2048Mi"
+            cpu: "2048m"
diff --git a/.github/kustomize/overlays/staging/deployment-stt-patch.yaml b/.github/kustomize/overlays/staging/deployment-stt-patch.yaml
new file mode 100644
index 0000000..48b2409
--- /dev/null
+++ b/.github/kustomize/overlays/staging/deployment-stt-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: stt-service
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+      - name: stt-service
+        resources:
+          requests:
+            memory: "512Mi"
+            cpu: "512m"
+          limits:
+            memory: "2048Mi"
+            cpu: "2048m"
diff --git a/.github/kustomize/overlays/staging/deployment-user-patch.yaml b/.github/kustomize/overlays/staging/deployment-user-patch.yaml
new file mode 100644
index 0000000..2a75059
--- /dev/null
+++ b/.github/kustomize/overlays/staging/deployment-user-patch.yaml
@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: user-service
+spec:
+  replicas: 2
+  template:
+    spec:
+      containers:
+      - name: user-service
+        resources:
+          requests:
+            memory: "512Mi"
+            cpu: "512m"
+          limits:
+            memory: "2048Mi"
+            cpu: "2048m"
diff --git a/.github/kustomize/overlays/staging/ingress-patch.yaml b/.github/kustomize/overlays/staging/ingress-patch.yaml
new file mode 100644
index 0000000..9de7857
--- /dev/null
+++ b/.github/kustomize/overlays/staging/ingress-patch.yaml
@@ -0,0 +1,46 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: hgzero-ingress
+  annotations:
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+spec:
+  rules:
+  - host: hgzero-staging-api.example.com
+    http:
+      paths:
+      - path: /api/users
+        pathType: Prefix
+        backend:
+          service:
+            name: user-service
+            port:
+              number: 8080
+      - path: /api/meetings
+        pathType: Prefix
+        backend:
+          service:
+            name: meeting-service
+            port:
+              number: 8080
+      - path: /api/stt
+        pathType: Prefix
+        backend:
+          service:
+            name: stt-service
+            port:
+              number: 8080
+      - path: /api/ai
+        pathType: Prefix
+        backend:
+          service:
+            name: ai-service
+            port:
+              number: 8080
+      - path: /api/notifications
+        pathType: Prefix
+        backend:
+          service:
+            name: notification-service
+            port:
+              number: 8080
diff --git a/.github/kustomize/overlays/staging/kustomization.yaml b/.github/kustomize/overlays/staging/kustomization.yaml
new file mode 100644
index 0000000..4210839
--- /dev/null
+++ b/.github/kustomize/overlays/staging/kustomization.yaml
@@ -0,0 +1,91 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: hgzero
+
+resources:
+- ../../base
+
+patches:
+# Common patches
+- path: cm-common-patch.yaml
+  target:
+    kind: ConfigMap
+    name: hgzero-common-config
+
+- path: secret-common-patch.yaml
+  target:
+    kind: Secret
+    name: hgzero-common-secret
+
+- path: ingress-patch.yaml
+  target:
+    kind: Ingress
+    name: hgzero-ingress
+
+# User service patches
+- path: deployment-user-patch.yaml
+  target:
+    kind: Deployment
+    name: user-service
+
+- path: secret-user-patch.yaml
+  target:
+    kind: Secret
+    name: user-service-secret
+
+# Meeting service patches
+- path: deployment-meeting-patch.yaml
+  target:
+    kind: Deployment
+    name: meeting-service
+
+- path: secret-meeting-patch.yaml
+  target:
+    kind: Secret
+    name: meeting-service-secret
+
+# STT service patches
+- path: deployment-stt-patch.yaml
+  target:
+    kind: Deployment
+    name: stt-service
+
+- path: secret-stt-patch.yaml
+  target:
+    kind: Secret
+    name: stt-service-secret
+
+# AI service patches
+- path: deployment-ai-patch.yaml
+  target:
+    kind: Deployment
+    name: ai-service
+
+- path: secret-ai-patch.yaml
+  target:
+    kind: Secret
+    name: ai-service-secret
+
+# Notification service patches
+- path: deployment-notification-patch.yaml
+  target:
+    kind: Deployment
+    name: notification-service
+
+- path: secret-notification-patch.yaml
+  target:
+    kind: Secret
+    name: notification-service-secret
+
+images:
+- name: user-service
+  newTag: staging-latest
+- name: meeting-service
+  newTag: staging-latest
+- name: stt-service
+  newTag: staging-latest
+- name: ai-service
+  newTag: staging-latest
+- name: notification-service
+  newTag: staging-latest
diff --git a/.github/kustomize/overlays/staging/secret-ai-patch.yaml b/.github/kustomize/overlays/staging/secret-ai-patch.yaml
new file mode 100644
index 0000000..16fe297
--- /dev/null
+++ b/.github/kustomize/overlays/staging/secret-ai-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: ai-service-secret
+type: Opaque
+stringData:
+  DB_HOST: "ai-db-staging"
+  DB_PORT: "5432"
+  DB_NAME: "ai_db_staging"
+  DB_USERNAME: "ai_service"
+  DB_PASSWORD: "your-staging-ai-db-password"
diff --git a/.github/kustomize/overlays/staging/secret-common-patch.yaml b/.github/kustomize/overlays/staging/secret-common-patch.yaml
new file mode 100644
index 0000000..92c4565
--- /dev/null
+++ b/.github/kustomize/overlays/staging/secret-common-patch.yaml
@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: hgzero-common-secret
+type: Opaque
+stringData:
+  JWT_SECRET: "your-staging-jwt-secret-key-here-change-in-production"
+  JWT_EXPIRATION: "3600000"
+  REDIS_PASSWORD: "your-staging-redis-password"
diff --git a/.github/kustomize/overlays/staging/secret-meeting-patch.yaml b/.github/kustomize/overlays/staging/secret-meeting-patch.yaml
new file mode 100644
index 0000000..4408298
--- /dev/null
+++ b/.github/kustomize/overlays/staging/secret-meeting-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: meeting-service-secret
+type: Opaque
+stringData:
+  DB_HOST: "meeting-db-staging"
+  DB_PORT: "5432"
+  DB_NAME: "meeting_db_staging"
+  DB_USERNAME: "meeting_service"
+  DB_PASSWORD: "your-staging-meeting-db-password"
diff --git a/.github/kustomize/overlays/staging/secret-notification-patch.yaml b/.github/kustomize/overlays/staging/secret-notification-patch.yaml
new file mode 100644
index 0000000..7314016
--- /dev/null
+++ b/.github/kustomize/overlays/staging/secret-notification-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: notification-service-secret
+type: Opaque
+stringData:
+  DB_HOST: "notification-db-staging"
+  DB_PORT: "5432"
+  DB_NAME: "notification_db_staging"
+  DB_USERNAME: "notification_service"
+  DB_PASSWORD: "your-staging-notification-db-password"
diff --git a/.github/kustomize/overlays/staging/secret-stt-patch.yaml b/.github/kustomize/overlays/staging/secret-stt-patch.yaml
new file mode 100644
index 0000000..726a148
--- /dev/null
+++ b/.github/kustomize/overlays/staging/secret-stt-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: stt-service-secret
+type: Opaque
+stringData:
+  DB_HOST: "stt-db-staging"
+  DB_PORT: "5432"
+  DB_NAME: "stt_db_staging"
+  DB_USERNAME: "stt_service"
+  DB_PASSWORD: "your-staging-stt-db-password"
diff --git a/.github/kustomize/overlays/staging/secret-user-patch.yaml b/.github/kustomize/overlays/staging/secret-user-patch.yaml
new file mode 100644
index 0000000..a956838
--- /dev/null
+++ b/.github/kustomize/overlays/staging/secret-user-patch.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: user-service-secret
+type: Opaque
+stringData:
+  DB_HOST: "user-db-staging"
+  DB_PORT: "5432"
+  DB_NAME: "user_db_staging"
+  DB_USERNAME: "user_service"
+  DB_PASSWORD: "your-staging-user-db-password"
diff --git a/.github/scripts/deploy-actions.sh b/.github/scripts/deploy-actions.sh
new file mode 100755
index 0000000..37d311d
--- /dev/null
+++ b/.github/scripts/deploy-actions.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+set -e
+
+ENVIRONMENT=${1:-dev}
+IMAGE_TAG=${2:-latest}
+
+echo "🚀 Manual deployment starting..."
+echo "Environment: $ENVIRONMENT"
+echo "Image Tag: $IMAGE_TAG"
+
+# Check if kustomize is installed
+if ! command -v kustomize &> /dev/null; then
+    echo "Installing Kustomize..."
+    curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
+    sudo mv kustomize /usr/local/bin/
+fi
+
+# Load environment variables from .github/config
+if [[ -f ".github/config/deploy_env_vars_${ENVIRONMENT}" ]]; then
+    source ".github/config/deploy_env_vars_${ENVIRONMENT}"
+    echo "✅ Environment variables loaded for $ENVIRONMENT"
+else
+    echo "❌ Environment configuration file not found: .github/config/deploy_env_vars_${ENVIRONMENT}"
+    exit 1
+fi
+
+# Create namespace
+echo "📝 Creating namespace hgzero..."
+kubectl create namespace hgzero --dry-run=client -o yaml | kubectl apply -f -
+
+# 환경별 이미지 태그 업데이트 (.github/kustomize 사용)
+cd .github/kustomize/overlays/${ENVIRONMENT}
+
+echo "🔄 Updating image tags..."
+# 서비스 배열 정의
+services=(user meeting stt ai notification)
+
+# 각 서비스별 이미지 태그 업데이트
+for service in "${services[@]}"; do
+  kustomize edit set image acrdigitalgarage02.azurecr.io/hgzero/$service:${ENVIRONMENT}-${IMAGE_TAG}
+done
+
+echo "🚀 Deploying to Kubernetes..."
+# 배포 실행
+kubectl apply -k .
+
+echo "⏳ Waiting for deployments to be ready..."
+# 서비스별 배포 상태 확인
+for service in "${services[@]}"; do
+  kubectl rollout status deployment/$service -n hgzero --timeout=300s || echo "⚠️ $service deployment timeout"
+done
+
+echo "🔍 Health check..."
+# 각 서비스의 Health Check
+for service in "${services[@]}"; do
+  POD=$(kubectl get pod -n hgzero -l app.kubernetes.io/name=$service -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || echo "")
+  if [[ -n "$POD" ]]; then
+    kubectl -n hgzero exec $POD -- curl -f http://localhost:8080/actuator/health 2>/dev/null || echo "⚠️ $service health check failed"
+  else
+    echo "⚠️ $service pod not found"
+  fi
+done
+
+echo "📋 Service Information:"
+kubectl get pods -n hgzero
+kubectl get services -n hgzero
+kubectl get ingress -n hgzero
+
+echo "✅ GitHub Actions deployment completed successfully!"
diff --git a/.github/workflows/backend-cicd.yaml b/.github/workflows/backend-cicd.yaml
new file mode 100644
index 0000000..3d66175
--- /dev/null
+++ b/.github/workflows/backend-cicd.yaml
@@ -0,0 +1,276 @@
+name: Backend Services CI/CD
+
+on:
+  push:
+    branches: [ main, develop ]
+    paths:
+      - 'user/**'
+      - 'meeting/**'
+      - 'stt/**'
+      - 'ai/**'
+      - 'notification/**'
+      - 'common/**'
+      - '.github/**'
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+    inputs:
+      ENVIRONMENT:
+        description: 'Target environment'
+        required: true
+        default: 'dev'
+        type: choice
+        options:
+          - dev
+          - staging
+          - prod
+      SKIP_SONARQUBE:
+        description: 'Skip SonarQube Analysis'
+        required: false
+        default: 'true'
+        type: choice
+        options:
+          - 'true'
+          - 'false'
+
+env:
+  REGISTRY: acrdigitalgarage02.azurecr.io
+  IMAGE_ORG: hgzero
+  RESOURCE_GROUP: rg-digitalgarage-02
+  AKS_CLUSTER: aks-digitalgarage-02
+  NAMESPACE: hgzero
+
+jobs:
+  build:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    outputs:
+      image_tag: ${{ steps.set_outputs.outputs.image_tag }}
+      environment: ${{ steps.set_outputs.outputs.environment }}
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v3
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: 'gradle'
+
+      - name: Determine environment
+        id: determine_env
+        run: |
+          # Use input parameter or default to 'dev'
+          ENVIRONMENT="${{ github.event.inputs.ENVIRONMENT || 'dev' }}"
+          echo "environment=$ENVIRONMENT" >> $GITHUB_OUTPUT
+
+      - name: Load environment variables
+        id: env_vars
+        run: |
+          ENV=${{ steps.determine_env.outputs.environment }}
+
+          # Initialize variables with defaults
+          REGISTRY="acrdigitalgarage02.azurecr.io"
+          IMAGE_ORG="hgzero"
+          RESOURCE_GROUP="rg-digitalgarage-02"
+          AKS_CLUSTER="aks-digitalgarage-02"
+          NAMESPACE="hgzero"
+
+          # Read environment variables from .github/config file
+          if [[ -f ".github/config/deploy_env_vars_${ENV}" ]]; then
+            while IFS= read -r line || [[ -n "$line" ]]; do
+              # Skip comments and empty lines
+              [[ "$line" =~ ^#.*$ ]] && continue
+              [[ -z "$line" ]] && continue
+
+              # Extract key-value pairs
+              key=$(echo "$line" | cut -d '=' -f1)
+              value=$(echo "$line" | cut -d '=' -f2-)
+
+              # Override defaults if found in config
+              case "$key" in
+                "resource_group") RESOURCE_GROUP="$value" ;;
+                "cluster_name") AKS_CLUSTER="$value" ;;
+              esac
+            done < ".github/config/deploy_env_vars_${ENV}"
+          fi
+
+          # Export for other jobs
+          echo "REGISTRY=$REGISTRY" >> $GITHUB_ENV
+          echo "IMAGE_ORG=$IMAGE_ORG" >> $GITHUB_ENV
+          echo "RESOURCE_GROUP=$RESOURCE_GROUP" >> $GITHUB_ENV
+          echo "AKS_CLUSTER=$AKS_CLUSTER" >> $GITHUB_ENV
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build with Gradle
+        run: |
+          ./gradlew build -x test
+
+      - name: SonarQube Analysis & Quality Gate
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+        run: |
+          # Check if SonarQube should be skipped
+          SKIP_SONARQUBE="${{ github.event.inputs.SKIP_SONARQUBE || 'true' }}"
+
+          if [[ "$SKIP_SONARQUBE" == "true" ]]; then
+            echo "⏭️ Skipping SonarQube Analysis (SKIP_SONARQUBE=$SKIP_SONARQUBE)"
+            exit 0
+          fi
+
+          # Define services array
+          services=(user meeting stt ai notification)
+
+          # Run tests, coverage reports, and SonarQube analysis for each service
+          for service in "${services[@]}"; do
+            ./gradlew :$service:test :$service:jacocoTestReport :$service:sonar \
+              -Dsonar.projectKey=hgzero-$service-${{ steps.determine_env.outputs.environment }} \
+              -Dsonar.projectName=hgzero-$service-${{ steps.determine_env.outputs.environment }} \
+              -Dsonar.host.url=$SONAR_HOST_URL \
+              -Dsonar.token=$SONAR_TOKEN \
+              -Dsonar.java.binaries=build/classes/java/main \
+              -Dsonar.coverage.jacoco.xmlReportPaths=build/reports/jacoco/test/jacocoTestReport.xml \
+              -Dsonar.exclusions=**/config/**,**/entity/**,**/dto/**,**/*Application.class,**/exception/**
+          done
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-builds
+          path: |
+            user/build/libs/*.jar
+            meeting/build/libs/*.jar
+            stt/build/libs/*.jar
+            ai/build/libs/*.jar
+            notification/build/libs/*.jar
+
+      - name: Set outputs
+        id: set_outputs
+        run: |
+          # Generate timestamp for image tag
+          IMAGE_TAG=$(date +%Y%m%d%H%M%S)
+          echo "image_tag=$IMAGE_TAG" >> $GITHUB_OUTPUT
+          echo "environment=${{ steps.determine_env.outputs.environment }}" >> $GITHUB_OUTPUT
+
+  release:
+    name: Build and Push Docker Images
+    needs: build
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: app-builds
+
+      - name: Set environment variables from build job
+        run: |
+          echo "REGISTRY=${{ env.REGISTRY }}" >> $GITHUB_ENV
+          echo "IMAGE_ORG=${{ env.IMAGE_ORG }}" >> $GITHUB_ENV
+          echo "ENVIRONMENT=${{ needs.build.outputs.environment }}" >> $GITHUB_ENV
+          echo "IMAGE_TAG=${{ needs.build.outputs.image_tag }}" >> $GITHUB_ENV
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub (prevent rate limit)
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - name: Login to Azure Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.ACR_USERNAME }}
+          password: ${{ secrets.ACR_PASSWORD }}
+
+      - name: Build and push Docker images for all services
+        run: |
+          # Define services array
+          services=(user meeting stt ai notification)
+
+          # Build and push each service image
+          for service in "${services[@]}"; do
+            echo "Building and pushing $service..."
+            docker build \
+              --build-arg BUILD_LIB_DIR="$service/build/libs" \
+              --build-arg ARTIFACTORY_FILE="$service.jar" \
+              -f deployment/container/Dockerfile-backend \
+              -t ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/$service:${{ needs.build.outputs.environment }}-${{ needs.build.outputs.image_tag }} .
+
+            docker push ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/$service:${{ needs.build.outputs.environment }}-${{ needs.build.outputs.image_tag }}
+          done
+
+  deploy:
+    name: Deploy to Kubernetes
+    needs: [build, release]
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set image tag environment variable
+        run: |
+          echo "IMAGE_TAG=${{ needs.build.outputs.image_tag }}" >> $GITHUB_ENV
+          echo "ENVIRONMENT=${{ needs.build.outputs.environment }}" >> $GITHUB_ENV
+
+      - name: Install Azure CLI
+        run: |
+          curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
+
+      - name: Azure Login
+        uses: azure/login@v1
+        with:
+          creds: ${{ secrets.AZURE_CREDENTIALS }}
+
+      - name: Setup kubectl
+        uses: azure/setup-kubectl@v3
+
+      - name: Get AKS Credentials
+        run: |
+          az aks get-credentials --resource-group ${{ env.RESOURCE_GROUP }} --name ${{ env.AKS_CLUSTER }} --overwrite-existing
+
+      - name: Create namespace
+        run: |
+          kubectl create namespace ${{ env.NAMESPACE }} --dry-run=client -o yaml | kubectl apply -f -
+
+      - name: Install Kustomize
+        run: |
+          curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
+          sudo mv kustomize /usr/local/bin/
+
+      - name: Update Kustomize images and deploy
+        run: |
+          # 환경별 디렉토리로 이동
+          cd .github/kustomize/overlays/${{ env.ENVIRONMENT }}
+
+          # 각 서비스별 이미지 태그 업데이트
+          kustomize edit set image ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/user:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
+          kustomize edit set image ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/meeting:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
+          kustomize edit set image ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/stt:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
+          kustomize edit set image ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/ai:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
+          kustomize edit set image ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/notification:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
+
+          # 매니페스트 적용
+          kubectl apply -k .
+
+      - name: Wait for deployments to be ready
+        run: |
+          echo "Waiting for deployments to be ready..."
+          kubectl -n ${{ env.NAMESPACE }} wait --for=condition=available deployment/user --timeout=300s || true
+          kubectl -n ${{ env.NAMESPACE }} wait --for=condition=available deployment/meeting --timeout=300s || true
+          kubectl -n ${{ env.NAMESPACE }} wait --for=condition=available deployment/stt --timeout=300s || true
+          kubectl -n ${{ env.NAMESPACE }} wait --for=condition=available deployment/ai --timeout=300s || true
+          kubectl -n ${{ env.NAMESPACE }} wait --for=condition=available deployment/notification --timeout=300s || true