{
  "short_name": "QRprove",
  "name": "QRprove ...coming soon...",
  "icons": [{
     "src": "icon.png",
     "type": "image/png",
     "sizes": "192x192"
  }]
  "start_url": "/",
  "background_color": "#fafafa",
  "theme_color": "#fafafa"
}