컨테이너

# Dockerfile: 멀티스테이지 빌드 예시
# 빌드 스테이지
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
RUN npm run build

# 런타임 스테이지 (최소 이미지)
FROM node:20-alpine AS runner
WORKDIR /app
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 appuser

COPY --from=builder --chown=appuser:nodejs /app/dist ./dist
COPY --from=builder --chown=appuser:nodejs /app/node_modules ./node_modules

USER appuser
EXPOSE 3000
ENV NODE_ENV=production

CMD ["node", "dist/index.js"]

---
# docker-compose.yml: 멀티 컨테이너 구성
version: '3.8'
services:
  app:
    build: .
    ports:
      - "3000:3000"
    environment:
      - DATABASE_URL=postgres://db:5432/mydb
    depends_on:
      db:
        condition: service_healthy
    restart: unless-stopped

  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_DB: mydb
      POSTGRES_USER: user
      POSTGRES_PASSWORD: ${DB_PASSWORD}
    volumes:
      - postgres_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U user -d mydb"]
      interval: 5s
      timeout: 5s
      retries: 5

volumes:
  postgres_data: