Bootstrap Starter Theme is intended to be used as a template and CSS/SASS starting point for building Bootstrap based themes for Drupal.
The goal of this theme is to use little variables and have very simple templates that a developer can start editing right away. The only way to customize this starter theme is by coding and is for advanced themers only.
This starter theme assumes that you have NPM (Node Package Manager) installed and available locally in your development environment/server. To check if it is available type "npm -v". It should spit back the version.