Trigger an Automation or Routine and get a notification when house burglar alarm goes off

Hi all,

I am sure this one has come up before …I am looking for a simple and reliable way to get this in place please.

From what I know, I should be able to get a 12v trigger from the Alarm Panel, when the alarm starts to ring …but then how do I get this to trigger a Zigbee or WiFi device of some sort and a notification on my phone?