{
    "name": "{{ theme:sitename }}",
    "icons": [
        {
            "src": "{{ theme:favicon_192 }}",
            "sizes": "192x192",
            "type": "image/png"
        },
        {
            "src": "{{ theme:favicon_256 }}",
            "sizes": "256x256",
            "type": "image/png"
        }
    ]
}