The repository contains the content represented in the website. It is meant to run in HUGO, and you should don't forget to:
mkdir themes
cd themes
git clone https://github.com/tracking-exposed/hugo-theme-trex trex
This would put in themes/trex the shared template
! You need the Hugo extended version (check the release at https://github.com/gohugoio/hugo/releases), or else you may see an error message like this one:
Transformation failed: TOCSS: failed to transform "bootstrap.scss" (text/x-scss): this feature is not available in your current Hugo version, see https://goo.gl/YMrWcn for more information.