https://pugjs.org
https://pugjs.org/api/getting-started.html
https://github.com/pugjs/pug

pug for webpack
https://github.com/pugjs/pug-loader
http://ru.stackoverflow.com/questions/584304/%D0%9A%D0%B0%D0%BA-%D0%BA%D0%BE%D0%BD%D0%B2%D0%B5%D1%80%D1%82%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D1%82%D1%8C-jade-pug-%D0%B2-webpack