Specify priority

[doits]

Just sent my first test messages successfully, thanks for this project!

One thing I'm missing already: I'd want to specify for an alert if it has a high priority (--> waking me up at night) or not (--> I can handle it next working day). I can set custom notification settings for different priorities ntfy, so this would be a nice feature to use.

Could there be a way to specify the priority of the notification? I could imagine to add a label named priority for an alert, so grafana-to-ntfy could check this label? It probably should loop over the alerts array and check the labels of each alert to use the highest one provided?

Or is there another/better way? WDYT?