Step
```
web:
  build: ./php
  ports:
    - "8000:80"
  links:
    - db
  volumes:
    - ./html:/var/www/html
db:
  image: orchardup/mysql
  environment:
    MYSQL_USER: mysql
    MYSQL_PASSWORD: mysql
    MYSQL_DATABASE: prestashop
  volumes:
    - ~/shop/data:/var/lib/mysql
```