Update renderer class; update docker env to PHP 8.3

docker/containers/web-server/Dockerfile

 #
 # GENERATED BY init.sh - template: ./templates/web-server-Dockerfile - 42dce773c83597a7d05af398bdd66d15
 #
-FROM php:8.2-apache
+FROM php:8.3-apache
 
 # install packages
 RUN apt-get update && apt-get install -y git unzip zip