How do I use Docker Compose for my Node.js applications?

How do I use Docker Compose for my Node.js applications?

You can use Docker Compose to define and run multi-container Docker applications. For a Node.js app, you'll need a docker-compose.yml file.

What should I include in the docker-compose.yml file?

You should define your services, including the Node.js app and any databases. Here's a basic example:

version: '3'
services:
  app:
    build: .
    ports:
      - '3000:3000'
    volumes:
      - .:/app
    environment:
      - NODE_ENV=development
  db:
    image: mongo
    ports:
      - '27017:27017'

How do I build and run the containers?

You can build and run your containers using the command docker-compose up --build. This will create the containers as defined in your docker-compose.yml.

Can I scale my Node.js app using Docker Compose?

Yes, you can scale your services by using the --scale option. For example, docker-compose up --scale app=3 will run three instances of your Node.js app.