# HealthSync - AI 건강 코치 Dockerfile
# Multi-stage build for optimized React application

# Stage 1: Dependencies installation
FROM node:18-alpine AS deps
WORKDIR /app

# Copy package files for better caching
COPY package*.json ./

# Install ALL dependencies (needed for build)
RUN npm ci && npm cache clean --force

# Stage 2: Build application  
FROM node:18-alpine AS builder
WORKDIR /app

# Copy dependencies from previous stage
COPY --from=deps /app/node_modules ./node_modules

# Copy source code
COPY . .

# Set build environment variables
ENV CI=false
ENV NODE_ENV=production

# Build the application
RUN npm run build

# Stage 3: Production runtime
FROM node:18-alpine AS runner

# Install wget for health check (alpine doesn't have curl by default)
RUN apk add --no-cache wget

# Create non-root user for security
RUN addgroup -g 1001 -S healthsync && \
    adduser -S healthsync -u 1001 -G healthsync

# Set working directory
WORKDIR /app

# Install serve locally for better security
RUN npm init -y && npm install serve@14.2.1

# Copy built application from builder stage
COPY --from=builder /app/build ./build

# Change ownership to non-root user
RUN chown -R healthsync:healthsync /app

# Expose port 3000
EXPOSE 3000

# Switch to non-root user
USER healthsync

# Health check using wget instead of curl
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/ || exit 1

# Start the application using npx to run local serve
CMD ["npx", "serve", "-s", "build", "-l", "3000", "--no-clipboard"]