This patch configures postfix to reject incoming email from its own
domains this is an effort to fight phishing of emails from my own domain
claiming to be from postmaster or alike.

References:
https://superuser.com/questions/964958/make-postfix-reject-incoming-email-spoofed-as-from-my-own-domain

This patch adds the upstream dashboards to this setup, adding them
automatically to Grafana.

References:
https://unpoller.com/docs/install/grafana#recommendations

This patch adds an unpoller deployment to the infrastrcuture which
should allow to monitor the unifi infrastructure from the Kubernetes
cluster. The next step, once metrics are collected is to add dashboards
and define alerts. But one step after the other.

References:
https://unpoller.com/