Add initial xdebug support

Enable using `XDEBUG_MODE=debug docker compose up`.

Dockerfile

@@ -32,10 +32,14 @@ RUN apt-get update -yqq \
   && rm -rf /var/lib/apt/lists/* /usr/share/doc /usr/share/man \
   && apt-get clean
 
+RUN pecl install xdebug
+
 RUN docker-php-ext-configure gd --with-jpeg
 
 RUN docker-php-ext-install gd pdo_mysql zip
 
+RUN docker-php-ext-enable xdebug
+
 COPY --chown=app:app phpunit.xml* ./
 
 

docker-compose.override.yaml.example

@@ -1,8 +1,6 @@
 services:
-  php-fpm:
+  php:
+    environment:
+      XDEBUG_MODE: ${XDEBUG_MODE:-off}
     extra_hosts:
-      - "host.docker.internal:host-gateway"
-
-  web:
-    ports:
-      - "80:80"
+      host.docker.internal: host-gateway

tools/docker/images/php/root/usr/local/etc/php/conf.d/xdebug.ini

@@ -1,6 +1,3 @@
-xdebug.mode=develop,debug
 xdebug.client_host=host.docker.internal
 xdebug.discover_client_host=0
-xdebug.output_dir=/tmp/xdebug
-xdebug.log=/tmp/xdebug/xdebug-docker-drupal-example.log
 xdebug.start_with_request=yes