This an example GitHub Pages site, rendered with Quarto and pushed from umich-biostatistics/revealjs-course-site as a git subtree.
An alternative to create something similar would be to use a .gitignore file
that ignores all but your site/ or doc/ directory, whatever you use as
the output dir for your quarto site.
Or just share your whole working folder if it doesn't matter and can be public, rendering your github page from the appropriate folder using the repo settings > pages > branch/directory setting.