source ⟩ hypertext ⟩ public ⟩ clock ⟩ clock_manifest.json

{
  "name": "A World Clock",
  "short_name": "World Clock",
  "start_url": "/clock",
  "display": "standalone",
  "background_color": "#000000",
  "icons": [
    {
      "src": "/clock/icon_192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "/clock/icon_512.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ]
}