Typically I would have Nagios/ HP OpenView/ Unicenter/Tivoli monitoring my applications -- the application agent would page/text/email prod support whenever the app goes down and also it would automatically configure NGINX to redirect everyone to "ooops we are having technical dificulties" page.It wouldn't take more than a day to configure assuning you have Nagios/OpenView/Unicenter etc in place . This is pretty mundane stuff to implement. And that is why I don't get this service.