qyadmin/routes/device.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::any('/request/heartbeat', 'Api\DeviceController@heartbeat');
Route::get('/image/{filename}', function ($filename) {
    $path = storage_path('app/public/' . $filename);
    $path = $path.'.jpg';
    if (!File::exists($path)) {
        abort(404);
    }

    $file = File::get($path);
    $type = File::mimeType($path);

    return response($file, 200)->header('Content-Type', $type);
});