docker-compose.yml

version: '2'
services:
  app-service:
    container_name: ${APP_CONTAINER_NAME}
    build:
      context: .
      dockerfile: Dockerfile-app
      args:
        - SITE_NAME=${SITE_NAME}
        - SERVER_ADMIN=${SERVER_ADMIN}
        - SERVER_LOCALE=${SERVER_LOCALE}
        - APACHE_LOG_DIR=${APACHE_LOG_DIR}
    restart: always
    ports:
      - ${APP_EXTERNAL_PORT}:80
    volumes:
      - ./www:/var/www
    environment:
      - DATABASE_INTERNAL_PORT=${DATABASE_INTERNAL_PORT}
      - DATABASE_NAME=${DATABASE_NAME_VALUE}
      - DATABASE_USER=${DATABASE_USER_VALUE}
      - DATABASE_PASSWORD=${DATABASE_PASSWORD_VALUE}
    links:
      - sql-service:database
    working_dir: /var/www/${SITE_NAME}  
  sql-service:
    container_name: ${SQL_CONTAINER_NAME}
    image: ${SQL_IMAGE}
    environment:
      - ${DATABASE_NAME_TAG}=${DATABASE_NAME_VALUE}
      - ${DATABASE_USER_TAG}=${DATABASE_USER_VALUE}
      - ${DATABASE_PASSWORD_TAG}=${DATABASE_PASSWORD_VALUE}
      - ${DATABASE_ROOT_PASSWORD_TAG}=${DATABASE_ROOT_PASSWORD_VALUE}
    ports:
      - ${DATABASE_EXTERNAL_PORT}:${DATABASE_INTERNAL_PORT}
    volumes:
      - ${DATABASE_EXTERNAL_VOLUME}:${DATABASE_INTERNAL_VOLUME}
    user: mysql  
    command: ${DATABASE_COMMAND}