docker-compose.yml

version: '3'
services:

  # PostgreSQL
  postgresdb:
    image: postgres:11.5
    restart: on-failure:5
    environment:
      POSTGRES_PASSWORD: password
      POSTGRES_USER: db_user

  # MySQL
  # mysqldb:
  #   image: mysql:5.7
  #   restart: on-failure:5
  #   environment:
  #     MYSQL_ROOT_PASSWORD: password
  #     MYSQL_PASSWORD: password
  #     MYSQL_USER: db_user

  app:
    build:
      context: .
      args:
        APP_HOME: $APP_HOME
        APP_PORT: $APP_PORT
        IMAGE: $IMAGE
    environment:
      RAILS_DB_ADAPTER: postgresql
      RAILS_DB_HOST: postgresdb
      RAILS_DB: app
      RAILS_DB_USERNAME: db_user
      RAILS_DB_PASSWORD: password
      RAILS_DB_ENCODING: utf8
      RAILS_ENV: development
    env_file: .env
    tty: true
    ports:
      - $APP_PORT:3000
      - 3035:3035
    depends_on:
      - postgresdb
  #    - mysqldb
    volumes:
      - ./app/.git:$APP_HOME/.git
      - ./share:$APP_HOME/../share