manifest.json

{
  "short_name": "PWA in Cosmic JS",
  "name": "Progressive Web App in React & Cosmic JS",
  "icons": [
    {
      "src": "chrome-touch-icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "android-chrome-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "start_url": "./",
  "display": "standalone",
  "theme_color": "#000000",
  "background_color": "#ffffff"
}