Transporting from GitHub:
Send e-mail or notification when pihole -up
updates Pi-Hole
you can already do this, you'll need to make some modifications
you will get a weekly mail, see below:
To: root
Subject: Cron root@raspberrypi /usr/local/bin/pihole updatePihole
::: Checking for updates...
:::
::: Pi-hole version is v2.9.5 (Latest version is v2.9.5)
::: Web Admin version is v1.4.4.2 (Latest version is v1.4.4.2)
:::
::: Everything is up to date!