Add Pi Alert to Pi Hole

[theeal]

Is your idea related to a problem? Please describe:
Not a problem. It expand use and control of network.

Describe the solution you'd like:
https://github.com/pucherot/Pi.Alert
Integrate this watchdog to alert you if there is new devices or device who goes down

Describe alternatives you've considered:
There may be alternatives I'm not aware of

Additional context:
-None-