The website content is created in Markdown and uses the Jekyll website generator.
In order to preview the website locally, install Jekyll, then in the directory where you checked out this project:
$ jekyll serve
…
Server address: http://127.0.0.1:4000/
Server running... press ctrl-c to stop.
In order to generate the static html for the site
$ jekyll build
The html is generated in the _site directory.