{ 
  "name": "WI Helper", 
  "short_name": "WI Helper", 
  "start_url": "/", 
  "display": "standalone", 
  "background_color": "#212529", 
  "theme_color": "#212529", 
  "orientation": "portrait-primary",
  "icons": [ 
    { 
      "src": "/img/icons/web-app-manifest-512x512.png", 
      "type": "image/png", 
      "sizes ": "512x512" ,
      "purpose": "any"
    }
  ] 
}