feat: Add root endpoint pointing to index

src/Controller/MainController.php

@@ -12,6 +12,12 @@ use Symfony\Component\Routing\Attribute\Route;
 
 final class MainController extends AbstractController
 {
+    #[Route('/', 'app_root')]
+    public function root(): Response
+    {
+        return $this->index('index.md');
+    }
+
     #[Route('/sync', 'app_sync')]
     public function sync(): Response
     {