Docker Compose Drupal

version: '2'
services:
  web:
    image: $USERNAME/drupal-drush
    volumes:
      - /root/drupal:/var/www/html
    ports:
      - 8081:80
    links:
      - db:mysql
  db:
    image: mysql:5.6
    environment:
      MYSQL_ROOT_PASSWORD: secret
      MYSQL_DATABASE: drupal
      MYSQL_USER: root
      MYSQL_PASSWORD: secret
    volumes:
      - /root/data/mysql:/var/lib/mysql
    ports:
      - 3309:3306
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    links:
      - db:db
    ports:
      - 8080:80