Lumen 5.8 enable cors

I'm trying to enable CORS in Lumen 5.8 backend api system, called by a React Js frontend.

Here what I did:

1. I've created CatchAllOptionsRequestsProvider.php to App\Providers folder.

use Illuminate\Support\ServiceProvider;
/**
 * If the incoming request is an OPTIONS request
 * we will register a handler for the requested route
 */
class CatchAllOptionsRequestsProvider extends ServiceProvider {
  public function register()
  {
    $request = app('request');
    if ($request->isMethod('OPTIONS'))
    {
      app()->options($request->path(), function() { return response('', 200); });
    }
  }
}

2. Then I've created CorsMiddleware.php

<?php

namespace App\Http\Middleware;

use Closure;

class CorsMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        //Intercepts OPTIONS requests
        if($request->isMethod('OPTIONS')) {
            $response = response('', 200);
        } else {
            // Pass the request to the next middleware
            $response = $next($request);
        }

        // Adds headers to the response
        $response->header('Access-Control-Allow-Methods', 'HEAD, GET, POST, PUT, PATCH, DELETE');
        $response->header('Access-Control-Allow-Headers', $request->header('Access-Control-Request-Headers'));
        $response->header('Access-Control-Allow-Origin', '*');

        // Sends it
        return $response;
    }
}

3. In bootstrap/app.php I've added this:

$app->middleware([
   App\Http\Middleware\CorsMiddleware::class
]);

$app->register(App\Providers\CatchAllOptionsRequestsProvider::class);

As result I get this error in bootstrap/app.php file: PHP Fatal error: Uncaught Error: Call to undefined method Illuminate\Foundation\Application::middleware() in /bootstrap/app.php:44

I don't wanna install any package, I've already tried without getting results, I'd like just to fix this error, because I guess it could be work. Could you please help me??

Thanks in advance for your answers.

source https://stackoverflow.com/questions/69742881/lumen-5-8-enable-cors