Hello everyone,
We just finished writing a blog post on how to easily setup pi-hole on balenaCloud (or openBalena if you wanna go full open-source) with just a few clicks. The idea is to have an up-to-date docker container ready to install on devices. All you need to do is flash a base-image on the sd-card, download a git repo and do a git push.
The link is this https://www.balena.io/blog/deploy-network-wide-ad-blocking-with-pi-hole-and-a-raspberry-pi/
Hope it helps you set up this amazing project even faster 
Cheers