{ "theme_color": "#ffffff", "background_color": "#ffffff", "display": "standalone", "name": "", "short_name": "", "icons":  [  { "sizes": "192x192", "src": "/imgs/logo192solid.png", "type": "image/png" } ,  { "sizes": "512x512", "src": "/imgs/logo512solid.png", "type": "image/png" }  ]  }