Default route ('/') on a localhost

-

$router = new Phalcon\Mvc\Router(false);

$router->removeExtraSlashes(true);

$router->add('/', array(
    'controller' => 'index',
    'action' => 'index'
));

$router->notFound(array(
    'controller' => 'index',
    'action' => 'page404'
));

$router->add('/index', array(
    'controller' => 'index',
    'action' => 'index'
));

return $router;

When accessing application without any route (https://localhost/myapp/) it shows notFound page (other routes work fine). If I use virtual host - everything works as expected. Any thoughts about that?