If your DNS sinkhole is down, your modem/router/host operating system settings (and even the PiHole itself) should allow a fallback. If you didn’t set that up and don’t know how, then you should consider not using Pihole until you know what you’re doing.

Yeah this is right up my alley. Can’t wait to install this and document everything.

I am very paranoid about security, so is there a reason you deter people from using this application in a Docker container per your website?