更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/unique-string/readme.md

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+# unique-string [![Build Status](https://travis-ci.org/sindresorhus/unique-string.svg?branch=master)](https://travis-ci.org/sindresorhus/unique-string)
+
+> Generate a unique random string
+
+
+## Install
+
+```
+$ npm install unique-string
+```
+
+
+## Usage
+
+```js
+const uniqueString = require('unique-string');
+
+uniqueString();
+//=> 'b4de2a49c8ffa3fbee04446f045483b2'
+```
+
+
+## API
+
+### uniqueString()
+
+Returns a 32 character unique string. Matches the length of MD5, which is [unique enough](https://stackoverflow.com/a/2444336/64949) for non-crypto purposes.
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)