render() and fix index()

src/Controller/PostController.php

@@ -17,7 +17,7 @@ class PostController extends AbstractController
     public function index(PostRepository $postRepository): Response
     {
         return $this->render('post/index.html.twig', [
-            'posts' => $postRepository->findAll(),
+            'posts' => $postRepository->findBy(['status' => 'published'], ['id' => 'DESC']),
         ]);
     }