codigo actual del servidor, con avances de joan

app/Http/Controllers/Api/V2/SubCategoryController.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Http\Controllers\Api\V2;
+
+use App\Http\Resources\V2\CategoryCollection;
+use App\Models\Category;
+
+class SubCategoryController extends Controller
+{
+    public function index($id)
+    {
+        return new CategoryCollection(Category::where('parent_id', $id)->get());
+    }
+}