Alerting rules for php-fpm-exporter

Hi there 👋

I am looking for alerting rules that fit with this exporter, in order to feed an "awesome" collection: https://github.com/samber/awesome-prometheus-alerts

The goal is to offer "out-of-the-box" rules in a single place.

Anybody here has such a thing ? 🙏

I think this should be cross-committed in this repo as well!