web:
  image: php:7.0.7-apache
  links:
    - db:postgres
  ports:
    - 80:80
  volumes:
    - .:/var/www/html
db:
  image: postgres:9.5.3
  ports:
    - 5432:5432
  environment:
    POSTGRES_PASSWORD: docker-postgres
    POSTGRES_USER: db_user
    POSTGRES_DB: db_name