"Under Maintenance" mode for Knack app

As a Builder, I would like to have a "Under Maintenance" mode so that users cannot access the Live App while they are making certain types of changes. When this status is enabled, this feature should force log off for users who are logged in and provide a customizable message that is displayed to Live App users.

It would also be helpful if this feature would allow for this status to be scheduled and provide a pre-notification message such as "There will be a maintenance period on Sunday from 2am - 4am CDT and the app will not be available at that time. We apologize for the inconvenience."

This is a must for corporate development, particularly for global deployment

I would use this feature a lot. Excellent idea.