Add Workbox to generate a Service Worker

[meesrutten]

Since every project we built with book of node includes a simple Service Worker, I want to add a standard Workbox config.

This is a working example:

module.exports = {
  "globDirectory": "public/",
  "globPatterns": [
    "**/*.{js,woff,woff2,png,svg,jpg,xml,ico,html,webmanifest,css}"
  ],
  "swDest": "app/views/sw.js"
}

In package.json --> NPM scripts:
"build:sw": "workbox generateSW config/workbox-config.js",