Fix: missing stage name in php-fpm Dockerfile

I simply added the stage name that the compose.prod.yml references for service php-fpm since it was not building when I tried using those fiels.

Author: Matra-Master

content/guides/frameworks/laravel/production-setup.md

@@ -98,7 +98,7 @@ RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local
     && composer install --no-dev --optimize-autoloader --no-interaction --no-progress --prefer-dist
 
 # Stage 2: Production environment
-FROM php:8.4-fpm
+FROM php:8.4-fpm AS production
 
 # Install only runtime libraries needed in production
 # libfcgi-bin and procps are required for the php-fpm-healthcheck script