$ node-rails settings bootstrap bootstrap --switch='true'$ node-rails settings bootstrap bootstrap --switch='false'
Default bootstrap overwrites happen in the bootstrap directory. Add sass files to index.scss in the bootstrap directory. Run build to see your changes because bootstrap is pre-bundled before changes to your application.
To remove pre-webpacked bootstrap, update your settings in webpack/settings.js for the key bootstrapToggle to value false. Just in case, the CLI failed.