manifest.json

{
    "name": "Ferry's Books",
    "short_name": "Books",
    "theme_color": "#00325a",
    "background_color": "#1d2434",
    "display": "standalone",
    "orientation": "portrait",
    "scope": "/",
    "start_url": "/",
    "icons":
    [
        {
        "src": "assets/favicons/android-chrome-192x192.png",
        "sizes": "192x192",
        "type": "image/png"
    },
    {
        "src": "assets/favicons/android-chrome-512x512.png",
        "sizes": "512x512",
        "type": "image/png"
    },
    {
        "src": "assets/favicons/apple-touch-icon.png",
        "sizes": "180x180",
        "type": "image/png"
    },
    {
        "src": "assets/favicons/favicon-32x32.png",
        "sizes": "32x32",
        "type": "image/png"
    },
    {
        "src": "assets/favicons/favicon-16x16.png",
        "sizes": "16x16",
        "type": "image/png"
    },
    {
        "src": "assets/favicons/favicon.ico",
        "sizes": "48x48",
        "type": "image/x-icon"
    }
    ]
}