add fallback

Author: gheorghelupu17

app/Http/Resources/Articles/ArticleResource.php

@@ -18,7 +18,7 @@ public function toArray(Request $request): array
         return [
             'id' => $this->id,
             'title' => $this->title,
-            'cover_photo_url' => $this->cover_photo_url,
+            'cover_photo_url' => $this->cover_photo_url ?? '#',
             'description' => Str::of($this->content)
                 ->stripTags()
                 ->limit(200),