manifest.js

{
  "name": "webPWA",
  "short_name": "PWAweb",
  "start_url": ".",
  "display": "standalone",
  "background_color": "#fff",
  "description": "A simply PWA app.",
  "icons": [{
  "src": "images/touch/homescreen1.png",
  "sizes": "48x48",
  "type": "image/png"
  }, {
  "src": "images/touch/homescreen2.png",
  "sizes": "72x72",
  "type": "image/png"
  }, {
  "src": "images/touch/homescreen3.png",
  "sizes": "96x96",
  "type": "image/png"
  }, {
  "src": "images/touch/homescreen4.png",
  "sizes": "144x144",
  "type": "image/png"
  }, {
  "src": "images/touch/homescreen5.png",
  "sizes": "168x168",
  "type": "image/png"
  }, {
  "src": "images/touch/homescreen6.png",
  "sizes": "192x192",
  "type": "image/png"
  }],
}