# Run a container
docker run -d --name myapp nginx

# List running containers
docker ps

# List all containers
docker ps -a

# Stop a container
docker stop myapp

# Start a stopped container
docker start myapp

# Remove a container
docker rm myapp

# Remove all stopped containers
docker container prune

# Pull an image
docker pull nginx:latest

# List images
docker images

# Remove an image
docker rmi nginx:latest

# Remove unused images
docker image prune -a

# Build an image
docker build -t myapp:v1 .

# Tag an image
docker tag myapp:v1 myapp:latest

# View logs
docker logs myapp

# Follow logs (like tail -f)
docker logs -f myapp

# Execute command in running container
docker exec -it myapp bash

# Inspect container
docker inspect myapp

# View container stats
docker stats myapp

FROM node:18-alpine

WORKDIR /app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 3000

CMD ["npm", "start"]

# Build stage
FROM node:18-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

# Production stage
FROM node:18-alpine
WORKDIR /app
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
EXPOSE 3000
CMD ["node", "dist/index.js"]

# Set environment variables
ENV NODE_ENV=production

# Create user (security best practice)
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nodejs -u 1001
USER nodejs

# Health check
HEALTHCHECK --interval=30s --timeout=3s \
  CMD node healthcheck.js

# Volume for persistent data
VOLUME /app/data

version: '3.8'

services:
  web:
    build: .
    ports:
      - "3000:3000"
    environment:
      - NODE_ENV=production
    depends_on:
      - db

  db:
    image: postgres:15
    environment:
      POSTGRES_PASSWORD: secret
    volumes:
      - db-data:/var/lib/postgresql/data

volumes:
  db-data:

# Start services
docker-compose up -d

# Stop services
docker-compose down

# View logs
docker-compose logs -f web

# Execute command in service
docker-compose exec web bash

# Rebuild services
docker-compose up -d --build

# Create network
docker network create mynetwork

# List networks
docker network ls

# Run container on network
docker run -d --network mynetwork --name app nginx

# Connect container to network
docker network connect mynetwork myapp

# Inspect network
docker network inspect mynetwork