更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/dotenv-expand/LICENSE

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+Copyright (c) 2016, Scott Motte
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

frontend/node_modules/dotenv-expand/README.md

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+# dotenv-expand
+
+<img src="https://raw.githubusercontent.com/motdotla/dotenv-expand/master/dotenv-expand.png" alt="dotenv-expand" align="right" />
+
+Dotenv-expand adds variable expansion on top of 
+[dotenv](http://github.com/motdotla/dotenv). If you find yourself needing to
+expand environment variables already existing on your machine, then
+dotenv-expand is your tool.
+
+[![BuildStatus](https://img.shields.io/travis/motdotla/dotenv-expand/master.svg?style=flat-square)](https://travis-ci.org/motdotla/dotenv-expand)
+[![NPM version](https://img.shields.io/npm/v/dotenv-expand.svg?style=flat-square)](https://www.npmjs.com/package/dotenv-expand)
+[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square)](https://github.com/feross/standard)
+
+## Install
+
+```bash
+npm install dotenv --save
+npm install dotenv-expand --save
+```
+
+## Usage
+
+As early as possible in your application, require dotenv and dotenv-expand, and
+wrap dotenv-expand around dotenv.
+
+```js
+var dotenv = require('dotenv')
+var dotenvExpand = require('dotenv-expand')
+
+var myEnv = dotenv.config()
+dotenvExpand(myEnv)
+```
+
+See [test/.env](./test/.env) for examples of variable expansion in your `.env`
+file. 
+

frontend/node_modules/dotenv-expand/index.d.ts

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+export = dotenv_expand;
+
+interface DotenvResult {
+    error?: Error;
+    parsed?: {
+        [name: string]: string;
+    };
+}
+
+declare function dotenv_expand(config: DotenvResult): DotenvResult;
+
+declare namespace dotenv_expand {
+    const prototype: {
+    };
+}

frontend/node_modules/dotenv-expand/package.json

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+{
+  "name": "dotenv-expand",
+  "version": "5.1.0",
+  "description": "Expand environment variables using dotenv",
+  "main": "lib/main.js",
+  "scripts": {
+    "test": "lab test/* --coverage",
+    "posttest": "npm run lint",
+    "lint": "standard"
+  },
+  "keywords": [
+    "dotenv",
+    "expand",
+    "variables"
+  ],
+  "author": "motdotla",
+  "license": "BSD-2-Clause",
+  "devDependencies": {
+    "dotenv": "^4.0.0",
+    "lab": "^13.0.1",
+    "should": "^11.2.1",
+    "standard": "^9.0.2"
+  },
+  "types": "./index.d.ts"
+}