{ "name": "A2B", "short_name": "A2B", "start_url": "/", "display": "standalone", "background_color": "#000000", "theme_color": "#000000",
  "icons": [ { "src": "assets/favicon-180.png", "sizes": "180x180", "type": "image/png" }, { "src": "assets/favicon-512.png", "sizes": "512x512", "type": "image/png" } ] }