docusaurust添加本地搜索

1. easyops-cn/docusaurus-search-local

插件地址：https://github.com/easyops-cn/docusaurus-search-local

安装步骤

1. npm install --save @easyops-cn/docusaurus-search-local
   # or
   yarn add @easyops-cn/docusaurus-search-local

2. docusaurus.config.js中添加

    themes: [
           // ... Your other themes.
           [
             require.resolve("@easyops-cn/docusaurus-search-local"),
             {
               // ... Your options.
               // `hashed` is recommended as long-term-cache of index file is possible.
               hashed: true,
               language: ["en", "zh"],
               highlightSearchTermsOnTargetPage: true,
               explicitSearchResultPath: true,
               // For Docs using Chinese, The `language` is recommended to set to:
               // ```
               // language: ["en", "zh"],
               // ```
             },
           ],
         ],