Add healthcheck in PHP back end of Storybook and handle new env var P…

…S_APP_VERSION

storybook/.env

@@ -17,4 +17,5 @@
 ###> symfony/framework-bundle ###
 APP_ENV=dev
 APP_SECRET=6ca3f5a44d55f1407362700a7565930c
+PS_APP_VERSION=dev
 ###< symfony/framework-bundle ###

storybook/config/services.yaml

@@ -1,5 +1,6 @@
 # https://symfony.com/doc/current/best_practices.html#use-parameters-for-application-configuration
 parameters:
+    app.version: '%env(PS_APP_VERSION)%'
 
 services:
     _defaults:

storybook/src/Controller/HealthCheckController.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+class HealthCheckController extends AbstractController
+{
+    #[Route('/healthcheck')]
+    public function index(): Response
+    {
+        return new JsonResponse([
+            'status' => 'ok',
+            'version' => $this->getParameter('app.version'),
+        ]);
+    }
+}