sarga/routes/web.php

<?php

/*
|--------------------------------------------------------------------------
| 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('app-ads.txt',function(){
    return 'facebook.com, 333307141073441, RESELLER, c3e20eee3f780d68';
});