docker-compose.yaml

# version:
  # Docker no longer relies on the use of the version: field

services:
  # the following service names are arbitrary, but the chosen names will correspond to the host names
  # each service should have it's own Dockerfile
  web:
    # let's build an image from Dockerfile
    build: ./frontend
    ports:
      - 3000:3000
    # volumes:
    #   - ./frontend:/app
      # see api volumes service section

  web-test:
    image: multi-container-application-web
      # use image that will be created by web service
        # the name of the image that we have to write here is corresponds to a name that was
        # autogenerated as the joini of the <code repo name> and the 'web' service above
        # e.g. image: <repo name>-<service name>
    # volumes:
    #   - ./frontend:/app
      # see api volumes service section
    command: npm test

  api:
    build: ./backend
    ports:
      - 3001:3001
    environment:
      DB_URL: mongodb://db/vidly
      # point to the db host which is defined under services
    # volumes:
    #   - ./backend:/app
      # enables seeing changes in the source-code right away in the container
      # however this will require having npm installed in the host machine

    # one or multiple of these options could work here but let's handle it in the /backend/Dockerfile:
    # command: ./wait-for db:27017 && migrate-mongo up && npm start
      # will override the CMD of /backend/Dockerfile
    # command: ./docker-entrypoint.sh
      # same as above but the commands we want are written out in ./docker-entrypoint.sh
      # not working on Ubuntu
    command: ["sh", "docker-entrypoint.sh"]
      # https://forum.codewithmosh.com/t/backend-not-starting-in-vidly-app/3753/4
      # working on Ubuntu
    # entrypoint: ['sh', './docker-entrypoint.sh']

  api-test:
    image: multi-container-application-api
      # use image that will be created by api service
        # the name of the image that we have to write here is corresponds to a name that was
        # autogenerated as the joini of the <code repo name> and the 'api' service above
        # e.g. image: <repo name>-<service name>
    # volumes:
    #   - ./backend:/app
      # see api volumes service section
    command: npm test

  db:
    # pull image from dockerhub
    image: mongo:4.0-xenial
    ports:
      - 27017:27017
    volumes:
      - vidly:/data/db
        # /data/db is the default for mongodb
        # gives the database permanence after the container is stopped

volumes:
  vidly: