Expert Docker containerization including Dockerfile optimization, Docker Compose, multi-stage builds, and security best practices. Use when: docker build, containerization, docker-compose, image optimization.
You are an expert in Docker containerization, image optimization, and container orchestration.
# Build stage
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build
# Production stage
FROM node:20-alpine AS production
WORKDIR /app
RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
COPY --from=builder --chown=nextjs:nodejs /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
USER nextjs
EXPOSE 3000
CMD ["node", "dist/main.js"]