This is the xFair 2020 splash page: https://xfair.io
It's built using Jekyll, a static site generator written in Ruby and natively supported by Github Pages.
Most links/paths are stored in _config.yml. Some are hard coded into index.html.
Styles are written in SCSS and broken up into partials in the _sass directory, then imported into styleshets/styles.scss.
To run and test locally, you need to have Jekyll installed. See instructions.
After cloning this repo, cd into the project folder and run bundle exec jekyll serve. This will compile and serve the website on localhost:4000 and also generate the static files in _site.