Using YAML to reuse parts of existing docker-compose configuration

docker-compose.yml

version: "3"
services:
  apache: &apacheConfig
    build: .
    volumes:
      - ./:/var/www/html:cached
      - ./docker/php-apache/php.ini:/usr/local/etc/php/php.ini
      - ./docker/php-apache/ssl-local:/etc/httpd/ssl
    working_dir: /var/www/html
    ports:
      - "8700:443"
      - "8800:80"
    links:
      - elasticsearch

  apache-xdebug:
    <<: *apacheConfig
    build: docker/xdebug
    volumes:
      - ./:/var/www/html:cached
      - ./docker/php-apache/php.ini:/usr/local/etc/php/php.ini
      - ./docker/php-apache/ssl-local:/etc/httpd/ssl
      - ./docker/xdebug/xdebug.ini:/usr/local/etc/php/conf.d/xdebug.ini