create dashboard controller

app/Http/Controllers/DashboardController.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+
+class DashboardController extends Controller
+{
+    /**
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        return Inertia::render('Dashboard');
+    }
+}