docker-compose.debug.yml

# docker-compose.debug.yml
version: "3.4"

services:
  php:
    build:
      context: .
      target: commsy_php_debug
    environment:
      # See https://docs.docker.com/docker-for-mac/networking/#i-want-to-connect-from-a-container-to-a-service-on-the-host
      # See https://github.com/docker/for-linux/issues/264
      # The `client_host` below may optionally be replaced with `discover_client_host=yes`
      # Add `start_with_request=yes` to start debug session on each request
      XDEBUG_CONFIG: >-
        client_host=host.docker.internal
      XDEBUG_MODE: debug
      # This should correspond to the server declared in PHPStorm `Preferences | Languages & Frameworks | PHP | Servers`
      # Then PHPStorm will use the corresponding path mappings
      PHP_IDE_CONFIG: serverName=commsy
    extra_hosts:
      # Ensure that host.docker.internal is correctly defined on Linux
      - host.docker.internal:host-gateway