public function configAction()
    {
        $response = new Response(
            json_encode($this->container->getParameter('ekyna_core.form_js'))
        );

        $response
            ->setPublic()
            ->setMaxAge(3600*6)
            ->setSharedMaxAge(3600*6)
            ->headers->add(['Content-Type' => 'application/json'])
        ;

        return $response;
    }