manifest.json

{
  "name": "BotVera",
  "short_name": "Vera",
  "start_url": "index.html",
  "display": "standalone",
  "background_color": "#ffffff",
  "theme_color": "#317EFB",
  "icons": [
    {
      "src": "icon_vera2.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "icon_vera.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ]
}