version: '3'
services:
  mysql:
    image: mysql:5.7
    ports:
      - "3306:3306"
    environment:
      - MYSQL_ALLOW_EMPTY_PASSWORD=yes
  app:
    environment:
      BUNDLE_PATH: 'bundle'
      MYSQL_DB_HOST: 'mysql'
    build: docker/app
    volumes:
      - .:/app
      - bundle-vol:/bundle:cached
    command: irb
    tty: true
    stdin_open: true
    depends_on:
      - mysql
volumes:
  bundle-vol: