Erro na rota app | Zend Framework: Mais prática do seu framework predileto

ERRO:

A 404 error occurred
Page not found.
The requested URL could not be matched by routing.

No Exception available

IndexController.php

<?php
namespace Estoque\Controller;
use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;

class IndexController extends AbstractActionController{

    public function IndexAction(){
        echo "Welcome to Zend";
        exit();
    }
}

module.config.php

<?php

return array(
    'router'=> array(
        'routes'=>array(
            'application'=>array(
                'type'=>'Literal',
                'options'=>array(
                    'route'=>'/app',
                    'defaults'=>array(
                        '__NAMESPACE__'=>'Estoque\Controller',
                        'controller'=>'Index',
                        'action'=>'index',
                    )
                )

            )
        )
    ),
    'controllers'=>array(
        'invokables'=>array(
            'Estoque\Controller\Index'=>'Estoque\Controller\IndexController'
        )
    )
);

return array( 'router' => array ( 'routes' => array ( 'application' => array ( 'type' => 'Segment', 'options' => array ( 'route' => '/[:controller[/:action]]', 'constraints' => array( 'controller' => '[a-zA-Z][a-zA-Z0-9_-]*', 'action' => '[a-zA-Z][a-zA-Z0-9_-]*', ), 'defaults' => array ( '__NAMESPACE__' => 'Produto\Controller', 'controller' => 'Index', 'action' => 'Index' ), ), ), ), ));