Fix naming of REMOTE_PORT to more self-documented (#5322)

Author: oaratovskyi

changelog/dev-tweak_remote_port_arg_for_xdebug

@@ -0,0 +1,3 @@
+Significance: patch
+Type: dev
+Comment: naming changes to Dockerfile arg

docker-compose.yml

@@ -10,7 +10,7 @@ services:
       context: .
       dockerfile: ./docker/wordpress_xdebug/Dockerfile
       args:
-        - REMOTE_PORT=9000 # IDE/Editor's listener port
+        - XDEBUG_REMOTE_PORT=9000 # IDE/Editor's listener port
     container_name: woocommerce_payments_wordpress
     image: woocommerce_payments_wordpress
     restart: always

docker/README.md

@@ -55,7 +55,7 @@ services:
   wordpress:
     build:
       args:
-        - REMOTE_PORT=9003 # IDE/Editor's listener port
+        - XDEBUG_REMOTE_PORT=9003 # IDE/Editor's listener port
 ```
 I used port `9003` as an example.
 To apply the change, restart your containers using `npm run down && npm run up`

docker/wordpress_xdebug/Dockerfile

@@ -1,8 +1,8 @@
 FROM wordpress:php7.4
-ARG REMOTE_PORT
+ARG XDEBUG_REMOTE_PORT
 RUN pecl install xdebug-2.9.8 \
 	&& echo 'xdebug.remote_enable=1' >> $PHP_INI_DIR/php.ini \
-	&& echo "xdebug.remote_port=$REMOTE_PORT" >> $PHP_INI_DIR/php.ini \
+	&& echo "xdebug.remote_port=$XDEBUG_REMOTE_PORT" >> $PHP_INI_DIR/php.ini \
 	&& echo 'xdebug.remote_host=host.docker.internal' >> $PHP_INI_DIR/php.ini \
 	&& echo 'xdebug.remote_autostart=0' >> $PHP_INI_DIR/php.ini \
 	&& docker-php-ext-enable xdebug