Example code for https://rempel.world/guides/docker-development-environment.html

docker-compose.yml

version: '3'
services:
  ###############################
  # Built from local Dockerfile #
  ###############################
  web:
    # Build the Dockerfile in this directory.
    build: .
    # Mount this directory as a volume at /app
    volumes:
      - '.:/app'
    # Make all commands relative to our application directory
    working_dir: /app
    # The process that runs in the container.
    # Remeber, a container runs only ONE process.
    command: 'node server.js'
    # Set some environment variables to be used in the application
    environment:
      PORT: 8080
      # Notice the hostname postgres.
      # This is made available via container links.
      DATABASE_URL: 'postgres://postgres:@postgres:5432/postgres'
      REDIS_URL: 'redis://redis:6379'
      RABBIT_URL: 'amqp://rabbitmq'
    # Make the port available on the host machine
    # so that we can navigate there with our web browser.
    ports:
      - '8080:8080'
    # Link this container to other containers to create
    # a network interface.
    links:
      - postgres
      - redis
      - rabbitmq

  clock:
    build: .
    volumes:
      - '.:/app'
    working_dir: /app
    command: 'node clock.js'
    environment:
      DATABASE_URL: 'postgres://postgres:@postgres:5432/postgres'
      REDIS_URL: 'redis://redis:6379'
      RABBIT_URL: 'amqp://rabbitmq'
    links:
      - postgres
      - redis
      - rabbitmq

  worker:
    build: .
    volumes:
      - '.:/app'
    working_dir: /app
    command: 'node worker.js'
    environment:
      DATABASE_URL: 'postgres://postgres:@postgres:5432/postgres'
      REDIS_URL: 'redis://redis:6379'
      RABBIT_URL: 'amqp://rabbitmq'
    links:
      - postgres
      - redis
      - rabbitmq

  shell:
    build: .
    volumes:
      - '.:/app'
    working_dir: /app
    command: bash
    environment:
      DATABASE_URL: 'postgres://postgres:@postgres:5432/postgres'
      REDIS_URL: 'redis://redis:6379'
    ports:
      - '8080:8080'
    links:
      - postgres
      - redis
      - rabbitmq

  ############################
  # Built from remote images #
  ############################
  postgres:
    # Image name
    image: postgres
    # Expose the port on your local machine.
    # This is not needed to link containers.
    # BUT, it is handy for connecting to your
    # database with something like DataGrip from
    # you local host machine.
    ports:
      - '5432:5432'

  rabbitmq:
    image: rabbitmq
    ports:
      - '5672:5672'

  redis:
    image: redis
    ports:
      - '6379:6379'