Update

routes/web.php

@@ -2,17 +2,9 @@
 
 use Illuminate\Support\Facades\Route;
 
-/*
-|--------------------------------------------------------------------------
-| Web Routes
-|--------------------------------------------------------------------------
-|
-| Here is where you can register web routes for your application. These
-| routes are loaded by the RouteServiceProvider within a group which
-| contains the "web" middleware group. Now create something great!
-|
-*/
-
-Route::get('/', function () {
-    return view('welcome');
+Route::fallback(function () {
+    return response()->json([
+        'errcode' => 404,
+        'message' => 'Not Found',
+    ], 404);
 });