Medium - manifest service worker

manifest.json

{
    "short_name": "Time to Go",
    "name": "Time To Go!",
    "start_url": "index.html?launcher=true",
    "icons": [
        {
            "src": "assets/icon.png",
            "type": "image/png",
            "sizes": "128x128"
        }
    ],
    "background_color": "#2196F3",
    "theme_color": "#2196F3",
    "orientation": "portrait",
    "display": "standalone"
}