manifest.json

{
  "short_name": "ShortName",
  "name": "AppName",
  "icons": [
    {
      "src": "logo.png",
      "type": "image/png",
      "sizes": "192x192"
    }
  ],
  "display": "fullscreen",
  "orientation": "portrait",
  "background_color": "#252831",
  "theme_color": "#0094ff",
  "start_url": "/?webapp=true"
}