Docker для Node.js: контейнеризация приложений

1FROM node:20-alpine
2
3WORKDIR /app
4
5COPY package*.json ./
6RUN npm ci --only=production
7
8COPY . .
9
10EXPOSE 3000
11
12CMD ["node", "dist/index.js"]

1# Stage 1: Build
2FROM node:20-alpine AS builder
3WORKDIR /app
4COPY package*.json ./
5RUN npm ci
6COPY . .
7RUN npm run build
8
9# Stage 2: Production
10FROM node:20-alpine
11WORKDIR /app
12COPY package*.json ./
13RUN npm ci --only=production
14COPY --from=builder /app/dist ./dist
15EXPOSE 3000
16CMD ["node", "dist/index.js"]

1node_modules
2npm-debug.log
3dist
4.git
5.env

1# Сначала копируем package.json
2COPY package*.json ./
3RUN npm ci
4
5# Потом копируем код
6COPY . .

1FROM node:20-alpine  # ~180MB vs ~900MB для полного образа

1version: '3.8'
2services:
3  app:
4    build: .
5    ports:
6      - "3000:3000"
7    environment:
8      - NODE_ENV=production
9      - DATABASE_URL=postgresql://user:pass@db:5432/mydb
10    depends_on:
11      - db
12      - redis
13
14  db:
15    image: postgres:15-alpine
16    environment:
17      POSTGRES_USER: user
18      POSTGRES_PASSWORD: pass
19      POSTGRES_DB: mydb
20    volumes:
21      - postgres_data:/var/lib/postgresql/data
22
23  redis:
24    image: redis:7-alpine
25    ports:
26      - "6379:6379"
27
28volumes:
29  postgres_data:

1docker-compose up -d          # Запуск в фоне
2docker-compose down           # Остановка
3docker-compose logs -f        # Логи
4docker-compose exec app sh    # Войти в контейнер

1version: '3.8'
2services:
3  app:
4    build:
5      context: .
6      dockerfile: Dockerfile.dev
7    volumes:
8      - .:/app
9      - /app/node_modules
10    ports:
11      - "3000:3000"
12    command: npm run dev

1FROM node:20-alpine
2WORKDIR /app
3COPY package*.json ./
4RUN npm install
5COPY . .
6CMD ["npm", "run", "dev"]

1HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
2  CMD curl -f http://localhost:3000/health || exit 1

1services:
2  app:
3    healthcheck:
4      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
5      interval: 30s
6      timeout: 3s
7      retries: 3

1FROM node:20-alpine
2RUN addgroup -g 1001 -S nodejs
3RUN adduser -S nodeuser -u 1001
4WORKDIR /app
5COPY --chown=nodeuser:nodejs . .
6USER nodeuser

1services:
2  app:
3    secrets:
4      - db_password
5secrets:
6  db_password:
7    file: ./secrets/db_password.txt

1docker buildx build --platform linux/amd64,linux/arm64 -t myapp:latest .

1docker tag myapp:latest username/myapp:latest
2docker push username/myapp:latest

1docker pull username/myapp:latest
2``$
3
4## CI/CD с Docker
5
6### GitHub Actions