Message during maintenance

Is there a way to show users a message during the time we shut down Mattermost to do maintenance? I mean some static html instead of the standard 503 error message generated by the apache2 server.

This may help: Announcement Banner — Mattermost documentation.

Thanks for your reply. Yes, I’ve seen that. But this banner is to be used before the maintenance time, not during the maintenance itself.

This suggestion may be helpful: Is it possible to display the maintenance screen (HTML) on the Mattermost mobile app? - #3 by XxLilBoPeepsxX