Implement a caching mechanism

src/Controller/PromosController.php

@@ -12,11 +12,15 @@ final class PromosController extends BaseController
     #[Route('/promos', name: 'app_promos')]
     public function __invoke(): Response
     {
+        if($this->cache->getItem('list_promos')->isHit()) {
+            return $this->render('productList.html.twig', ['listType' => 'promos']);
+        }
+
         $products = Product::whereHas('currentPrice', fn(Builder $query) => $query->whereColumn('price', '<', 'productStandardPrice'))
             ->orderByDesc('starred')
             ->orderByDesc('created_by')
             ->with(['currentPrice'])
             ->get();
-        return $this->render('productList.html.twig', ['products' => $products]);
+        return $this->render('productList.html.twig', ['products' => $products, 'listType' => 'promos']);
     }
 }