Update

app/Providers/AppServiceProvider.php

@@ -2,6 +2,8 @@
 
 namespace App\Providers;
 
+use App\Models\MemeMedia;
+use App\Observers\MemeMediaObserver;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -19,6 +21,6 @@ public function register(): void
      */
     public function boot(): void
     {
-        //
+        MemeMedia::observe(MemeMediaObserver::class);
     }
 }