{
 "background_color": "purple",
 "display": "fullscreen",
 "icons": [
    {
        "src": "icon/logo.png",
        "sizes": "192x192",
        "type": "image/png"
    }
 ],
 "name": "神奇PDF",
 "short_name": "神奇PDF",
 "start_url": "/"
}