Activate symfony internal reverse proxy and link to only a redis server

Question

I'd like my symfony application to use the symfony internal reverse proxy. This is really easy:

# config/packages/framework.yaml
framework:
    http_cache:
        enabled: true
        debug: true
        trace_level: 'full'

// src/Controller/MyController.php
final class MyController
{
    #[Route('/articles', name: 'articles')]
    #[Cache(public: true, mustRevalidate: true, expires: 'tomorrow')]
    public function test(Request $request, TagAwareCacheInterface $cache, Environment $twig): Response
    {
        $page = $request->query->get('page', 1);

        $item = $cache->get("articles-page-{$page}", function(ItemInterface $item) use ($page, $twig) {
            if ($item->isHit()) {
                return $item->get();
            }

            // expensive algorithm to calculate $content variable
            // ...

            $item->set($content);

            return $item->get();
        });

        return new Response($item);
    }

So far so good, I now have this controller cached correctly into my filesystem.

I wanted my new http cache system to store exclusively into a redis server. So I added this:

# config/packages/cache.yaml
framework:
    cache:
        app: cache.adapter.redis
        default_redis_provider: redis://redis:6379

This does not work as expected as it sets both my redis and the filesystem caches.

When I empty my redis, reloading my url proves that my application uses the filesystem as http cache too.

// public/index.php
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';

return function (array $context) {
    $kernel = new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
    $cacheKernel = new Symfony\Bundle\FrameworkBundle\HttpCache\HttpCache($kernel);

    return $cacheKernel;
};

How do I do to only have the redis store for the http cache ?

Env:

"symfony/framework-bundle": "^6.1"

"predis/predis": "^2.0"