Fixes the configuration file

app/Providers/AppServiceProvider.php

@@ -16,7 +16,7 @@ final class AppServiceProvider extends ServiceProvider
      */
     public function register(): void
     {
-        //
+        $this->app->singleton(\App\Services\Config::class);
     }
 
     /**

app/Providers/NovaServiceProvider.php

@@ -4,6 +4,7 @@
 
 use App\Models\User;
 use App\Nova\CategoryResource;
+use App\Nova\ConfigResource;
 use App\Nova\Dashboards\Main;
 use App\Nova\LogResource;
 use App\Nova\QuestionGroupResource;
@@ -46,6 +47,10 @@ public function boot(): void
                 MenuSection::make('Users', [
                     MenuItem::resource(\App\Nova\User::class),
                 ])->icon('users')->collapsible(),
+
+                MenuSection::make('Settings', [
+                    MenuItem::resource(ConfigResource::class),
+                ])->icon('cog')->collapsible(),
             ];
         });
     }