Updates composer.dockerfile with permissions fixes

Adds arguments converted to env values. Adds dynamic addgroup/adduser commands based on env values.

Author: aschmelyun

composer.dockerfile

@@ -1,5 +1,11 @@
 FROM composer:2
 
-RUN addgroup -g 1000 laravel && adduser -G laravel -g laravel -s /bin/sh -D laravel
+ARG PHPGROUP
+ARG PHPUSER
+
+ENV PHPGROUP=${PHPGROUP}
+ENV PHPUSER=${PHPUSER}
+
+RUN addgroup -g 1000 ${PHPGROUP} && adduser -g ${PHPGROUP} -s /bin/sh -D ${PHPUSER}; exit 0
 
 WORKDIR /var/www/html