Created API endpoints

app/Http/Resources/QuestionnaireResource.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Resources;
+
+use Illuminate\Http\Resources\Json\Resource;
+
+class QuestionnaireResource extends Resource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @param  \Illuminate\Http\Request
+     * @return array
+     */
+    public function toArray($request)
+    {
+        // return parent::toArray($request);
+        return [
+            'id' => $this->id,
+            'category' => new CategoryResource($this->category),
+            'title' => $this->title,
+            'description' => $this->description,
+            'links' => [
+                'self' => route('questionnaires.show', ['questionnaires' => $this->id])
+            ]
+        ];
+    }
+}