manifest.json

{
    "name": "Install-App",
    "short_name": "PWA-APP",
    "start_url": "index.html",
    "display": "standalone",
    "background_color": "#FFFFFF",
    "theme_color": "#0000",
    "orientation": "portrait-primary",
    "icons": [
        {
            "src": "android/android-launchericon-512-512.png",
            "sizes": "512x512"
        },
        {
            "src": "android/android-launchericon-192-192.png",
            "sizes": "192x192"
        },
        {
            "src": "android/android-launchericon-144-144.png",
            "sizes": "144x144"
        },
        {
            "src": "android/android-launchericon-96-96.png",
            "sizes": "96x96"
        },
        {
            "src": "android/android-launchericon-72-72.png",
            "sizes": "72x72"
        },
        {
            "src": "android/android-launchericon-48-48.png",
            "sizes": "48x48"
        }
    ]
}