{
    "short_name": "bookclub",
    "name": "bookclub",
    "lang": "ja",
    "icons": [{
            "src": "favicon.ico",
            "type": "image/icon"
        },
        {
            "src": "book_img128x128.png",
            "type": "image/png"
        },
        {
            "src": "book_img180x180.png",
            "type": "image/png"
        },
        {
            "src": "book_img256x256.png",
            "type": "image/png"
        }
    ],
    "start_url": "/",
    "display": "standalone",
    "theme_color": "#c4e4fc",
    "background_color": "#ffffff"
}