Added Symfony AssetMapper.

config/bundles.php

@@ -10,4 +10,5 @@ return [
     Symfony\Bundle\SecurityBundle\SecurityBundle::class => ['all' => true],
     EasyCorp\Bundle\EasyAdminBundle\EasyAdminBundle::class => ['all' => true],
     Nelmio\CorsBundle\NelmioCorsBundle::class => ['all' => true],
+    Twig\Extra\TwigExtraBundle\TwigExtraBundle::class => ['all' => true],
 ];

config/packages/asset_mapper.yaml

@@ -0,0 +1,5 @@
+framework:
+    asset_mapper:
+        # The paths to make available to the asset mapper.
+        paths:
+            - assets/