Add functionality

[Cousclou]

Hi,

The project is quite interesting and could be a serious alternative to UptimeKuma.

Here are the points I think it would be nice to have:

The possibility of having a maintenance page in the event of maintenance on services, with a scheduler. And a description of the cause of the maintenance

Mail subscription to receive mails in case of maintenance on a service or when it's down.

Mass mailings to warn of maintenance.

[chamanbravo]

Hello,
Thank you for your feedbacks. I have a plan of adding those features. If there's anything that can be added or fixed, please let me know.
Thanks.