add site to view and upload files

Reviewed-on: sites/file-explorer#4

src/Controller/EntrypointController.php

@@ -0,0 +1,18 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+class EntrypointController extends AbstractController
+{
+    #[Route(path: '/', name: 'app_root', methods: Request::METHOD_GET)]
+    public function __invoke(): Response
+    {
+        return $this->redirectToRoute('app_home');
+    }
+}