If you use R Markdown for data analysis projects, you might like to put your HTML reports on the web for people to look at. It would be nice if those pages were closely tied to your GitHub repository, but HTML pages render as code on GitHub proper. So this repository is a template for making a GitHub pages version of your analysis. Not that you have to use GitHub pages: you could just as easily rsync your HTML files anywhere else that you want.
For example, here is the table of contents for rendered versions of every R Markdown document in this repository.
As little as possible. The aim is to be very lightweight. But it does do this:
.Rmdfile in the root directory of your project.
Don’t forget to commit the HTML files that you generate. You can then configure GitHub to create a web page from the master branch, as explained here.