webpack es6 sass template app
https://hackernoon.com/a-tale-of-webpack-4-and-how-to-finally-configure-it-in-the-right-way-4e94c8e7e5c1
https://itnext.io/how-to-write-a-frontend-javascript-plugin-using-es6-sass-webpack-a1c6d6fdeb71
develop
npm run start