This repo demonstrates how to import and customize bootstrap using node-sass. It uses an opinionated structure so you don't have to version control bootstrap directly. This is accomplished by hotfixing the sass imports straight from the node_modules folder. So anyone working on the folder knows that the bootstrap files were not modified at all, except for the variables declaration setting

Check out the guide for the reasoning behind setting the repo this way

This uses the standard create-react-app setup

npm install
npm start

Navigate to localhost:3000

This project was bootstrapped with Create React App.