The project webpage is organized according to _site.yml. Individual pages are created using Rmarkdown .Rmd files. Before committing and pushing to Github, click the Build button in Rstudio.
Some useful resources for building a webpage hosted on Github Pages comprising of Rmarkdown files:
https://github.com/lgreski/datasciencectacontent/blob/master/markdown/pml-ghPagesSetup.md
https://jules32.github.io/rmarkdown-website-tutorial/index.html
https://bookdown.org/yihui/rmarkdown/rmarkdown-site.html
https://www.emilyzabor.com/tutorials/rmarkdown_websites_tutorial.html
*Note: the default branch is set to gh-pages.
*Note: original repository was called LocalCovarianceOperator.