fix: remove dynamic port sed since base image exposes 80 natively

Dockerfile

@@ -6,5 +6,6 @@ COPY . /var/www/html/
 # Ensure proper permissions
 RUN chown -R www-data:www-data /var/www/html
 
-# Replace the default Apache port (80) with the dynamic PORT environment variable provided by Railway, then start Apache
-CMD sed -i "s/80/$PORT/g" /etc/apache2/sites-available/000-default.conf /etc/apache2/ports.conf && apache2-foreground
+# Apache uses port 80 by default, which Railway detects automatically.
+# We just need to start it.
+CMD ["apache2-foreground"]