https://help.github.com/en/github/working-with-github-pages/managing-a-custom-domain-for-your-github-pages-site https://help.github.com/en/github/working-with-g

https://help.github.com/en/github/working-with-github-pages/managing-a-custom-domain-for-your-github-pages-site https://help.github.com/en/github/working-with-github-pages/... Short is create a CNAME file in your site repo with your custom DNS in it, then add a CNAME in your DNS pointing to the GitHub pages DNS.