Full code refactor to Symfony7.4 with FrankenPHP

Includes significant breaking changes.
Default port and transportation changed to
http via port 80
Names of environment variables have changed.

src/Kernel.php

@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Kernel as BaseKernel;
+
+class Kernel extends BaseKernel {
+    use MicroKernelTrait;
+
+    private PersistCache $persistCache;
+
+    public function boot(): void {
+        parent::boot();
+
+        $this->persistCache = $this->container->get(PersistCache::class);
+        $this->persistCache->boot();
+    }
+
+    public function terminate(Request $request, Response $response): void {
+        $this->persistCache->persist();
+
+        parent::terminate($request, $response);
+    }
+}