Check one of the following links: https://patrickulrich.com/2022/12/26/how-to-setup-nip-05-verification-using-github-pages/ https://stacker.news/items/145928 Let me know if you have questions!
Thanks @zach... Does it matter if you are already using the domain?
For sure, happy to help. I don’t think it matters if domain is already being used; as far as I know you can just add the .well-known/Nostr.json file and make sure your _config.yml is setup. I have nip-05 on a few of my domains used for different things and I can rotate them whenever I feel like it. Kind of fun to have different ones going - helped me figure out the setup.