favicon 更改网站的图标

自定义的网站图标的插件，可以将自己的 logo 图标设置为网站的图标。

配置使用方法：

{
    "plugins": [
        "favicon"
    ],
    "pluginsConfig": {
        "favicon": {
            "shortcut": "assets/images/favicon.ico",
            "bookmark": "assets/images/favicon.ico",
            "appleTouch": "assets/images/apple-touch-icon.png",
            "appleTouchMore": {
                "120x120": "assets/images/apple-touch-icon-120x120.png",
                "180x180": "assets/images/apple-touch-icon-180x180.png"
            }
        }
    }
}

插件 Github 地址：https://github.com/menduo/gitbook-plugin-favicon

效果预览：参考本书的网页标签图标