Demo Site (Chrome v50 or later only)
Copy src/javascripts/config.js.sample to src/javascripts/config.js and setup the variables.
Run npm install.
Run npm start and open http://localhost:3000/webpack-dev-server/index.html.
If you can't stand the banner, open http://localhost:3000/ instead.
Run npm run build, then upload the contents in build/prod folder.
See Wiki