adding debug bundle and var-dumper requirement

app/config/bundles.php

@@ -10,4 +10,5 @@ return [
     Twig\Extra\TwigExtraBundle\TwigExtraBundle::class => ['all' => true],
     Symfony\Bundle\WebProfilerBundle\WebProfilerBundle::class => ['dev' => true, 'test' => true],
     Symfony\WebpackEncoreBundle\WebpackEncoreBundle::class => ['all' => true],
+    Symfony\Bundle\DebugBundle\DebugBundle::class => ['dev' => true, 'test' => true],
 ];