I had a PC Engine APU2 4 core just dying to have a purpose in life and so I Installed Pi-hole on it running Debian.
I followed these instructions for the Debian install part:
At the Debian Predefined Collections stage of the install be sure NOT to install anything other than the standard system tool.
Fratm helped me solve a few matters:
I had to install Sudo and I had to install Curl
It may be overkill, but that’s ok. It’s not hot and I have a ton of disk space for logs. Most importantly, it’s cool!