b) I would like to use SASS/SCSS and also have it easily convert to CSS Modules if create-react-app ever includes them with scss support. Also I’m not interested in punishing myself with vanilla css. 1) Have Docker on your computer. Really straight forward….

Source: http://start.jcolemorrison.com/no-eject-create-react-app-with-sass-storybook-and-yarn-in-a-docker-environment/