I'm using technitium DNS server which has module in NixOS.

It seems relatively well maintained and has what I need (web interface, one click set up etc.)

I'm still new to this stuff so I'm figuring it out as I test things out. I didn't want to buy a raspberry pi so I used an old libreboot thinkpad I had that I never used.

NixOS modules eliminate a lot of the jank involved which is why I use it, I've also used NixOS as a desktop in the past so it only makes sense.