/**
* return robots.txt
*/
public function actionGetRobots()
{
$robots = Robots::getRobots();
$response = \Yii::$app->response;
$response->headers->set('Content-Type', 'text/plain');
$response->format = \yii\web\Response::FORMAT_RAW;
$response->data = $robots;
\Yii::$app->end();
}
