fix: debug with info.php and robust port handling

Dockerfile

@@ -1,13 +1,17 @@
 FROM php:8.3-apache
 
-# Copy the application files to the Apache web root
+# Suppress ServerName warning
-COPY . /var/www/html/
+RUN echo "ServerName localhost" >> /etc/apache2/apache2.conf
 
-# Ensure proper permissions
+# Increase PHP limits for large code files
+RUN echo "memory_limit=512M" > /usr/local/etc/php/conf.d/custom.ini \
+    && echo "max_execution_time=300" >> /usr/local/etc/php/conf.d/custom.ini
+
+COPY . /var/www/html/
 RUN chown -R www-data:www-data /var/www/html
 
-# Change Apache to listen on port 8080 instead of 80
+# Dynamically set the port to $PORT (defaulting to 80 if not set)
-RUN sed -i 's/80/8080/g' /etc/apache2/sites-available/000-default.conf /etc/apache2/ports.conf
+# We use the shell form of CMD to ensure variable expansion
-EXPOSE 8080
+CMD sed -i "s/Listen 80/Listen ${PORT:-80}/g" /etc/apache2/ports.conf && \
-
+    sed -i "s/<VirtualHost \*:80>/<VirtualHost *:${PORT:-80}>/g" /etc/apache2/sites-available/000-default.conf && \
-CMD ["apache2-foreground"]
+    apache2-foreground

info.php

@@ -0,0 +1,3 @@
+<?php
+phpinfo();
+?>