# Multi-stage build for production optimization
FROM node:18-alpine as builder

WORKDIR /app

# Copy package files
COPY package*.json ./
COPY tsconfig*.json ./

# Install dependencies
RUN npm ci --only=production && npm cache clean --force

# Copy source code
COPY src/ ./src/

# Build the application
RUN npm run build

# Production stage
FROM node:18-alpine as production

WORKDIR /app

# Install only production dependencies
COPY package*.json ./
RUN npm ci --only=production && npm cache clean --force

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

# Create non-root user for security
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nestjs -u 1001

# Change ownership of the working directory
RUN chown -R nestjs:nodejs /app
USER nestjs

# Expose port
EXPOSE 3001

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node dist/health-check.js || exit 1

# Start the application
CMD ["node", "dist/main"]