Dockerfile

# Multi-stage build for production optimization
FROM node:20-alpine AS base

# Development dependencies for build
FROM base AS builder
WORKDIR /app

# Copy package files
COPY package.json package-lock.json* ./

# Install all dependencies (including dev dependencies)
RUN npm ci

# Copy source code
COPY . .

# Generate Prisma client
RUN npx prisma generate

# Build the application
RUN npm run build

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

# Production image
FROM base AS runner
WORKDIR /app

# Create non-root user for security
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nestjs

# Copy everything from builder (production node_modules + built app + generated Prisma)
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/prisma ./prisma
COPY --from=builder /app/package.json ./package.json

# Change ownership to non-root user
RUN chown -R nestjs:nodejs /app
USER nestjs

# Expose port
EXPOSE 3000

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

# Start the application
CMD ["npm", "run", "start:prod"]