Update Dockerfile

Author: GrahamCampbell

layers/fpm-dev/Dockerfile

@@ -10,8 +10,8 @@ ARG PHP_VERSION
 RUN mkdir -p /opt/bref/extensions
 
 # Install xdebug
-RUN pecl install xdebug-3.4.5
-RUN cp $(php -r "echo ini_get('extension_dir');")/xdebug.so /opt/bref/extensions
+RUN if [ $PHP_VERSION != "85" ]; then pecl install xdebug-3.4.5; fi
+RUN if [ $PHP_VERSION != "85" ]; then cp $(php -r "echo ini_get('extension_dir');")/xdebug.so /opt/bref/extensions; fi
 
 # Install Blackfire
 # https://blackfire.io/docs/up-and-running/installation?action=install&mode=full&version=latest&mode=full&location=server&os=manual&language=php#install-the-php-probe