Setup Travis
authorize repo
Setup deployment keys
configure travis.yml

https://docs.github.com/en/github/authenticating-to-github/keeping-your-account-and-data-secure/creating-a-personal-access-token
https://docs.travis-ci.com/user/deployment/pages/
https://www.freecodecamp.org/news/learn-how-to-automate-deployment-on-github-pages-with-travis-ci/

https://github.com/red-stripe/mussy-notebook/blob/main/.travis.yml