Integrating CKFinder / Load .html with view()

For anyone wondering, I made some progress:

new route in Config/Routes.php:

PHP Code:

$routes->group('ckfinder',function($routes) {
    $routes->get('', 'CKFinderController::index');
    $routes->get('/samples/(:any)', 'CKFinderController::index/$1');    
    $routes->get('(:any)', 'CKFinderController::index/$1');    
}); 


New Controller in Config/Controllers:

PHP Code:

class CKFinderController extends BaseController{
    public function index($folder = 'samples', $page = 'full-page-open.html')
    {
        $view = \Config\Services::renderer();
        $namespace = APPPATH.'ThirdParty/ckfinder/';
        return file_get_contents($namespace.$folder."/".$page);
    }
} 


I am wondering if there is a better way than file_get_contents for returning a .html, .css, .js & co. files as is...

I also seem to have some trouble running JS. An intended messagebox appears, but no content...