Custom PrometheusRule in cluster

In ACM, the file acm/prom_rules/example.rules.yaml describes an example of Prometheus status metrics that are collected by ACM.

In UC P6, we’re trying to supply metrics to PDLC via Prometheus expressions in the cluster. For example, we want to change the instance:node_status:avg1m record for our CODECO operator to something like this:

      # Average node failure
    - record: instance:node_status:avg1m
      expr: sum(avg_over_time(node_rssi_interference{...}[1m])) by (node)

Where do we make this change? Can we apply our own PrometheusRule yaml on the cluster and it will be picked up by ACM? Or should be make a change in the prom_rules directory of ACM example.rules.yaml file, and create a fork of ACM with the changes required to our operator? What is the intended way-of-working?

There is a small section in the README on Prometheus rules but I do not understand what is meant there.

Can you help us @deankel1000 @karamolegkos @tymon ?