fix headre

kernel/App.php

@@ -22,7 +22,7 @@ class App
     {
         $dispatcher = new Dispatcher(App::$collector->getData());
         $response = $dispatcher->dispatch($_SERVER['REQUEST_METHOD'], parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH));
-        header('Content-Type: ' . App::$responseType);
+        //header('Content-Type: ' . App::$responseType);
         App::$header->set();
         echo $response;
     }