DecEco安装JS SDK报错"Run 'npm install' failed"

### 该问题是怎么引起的？
您好，我通过DevEco Studio安装JS SDK时报错。如下图：
![输入图片说明](https://images.gitee.com/uploads/images/2020/0924/235958_7ae9810c_1040604.png "屏幕截图.png")

### 重现步骤
通过 DevEco Studio的HarmonyOS SDK入口下载JS SDK。
![输入图片说明](https://images.gitee.com/uploads/images/2020/0925/000401_d60ce998_1040604.png "屏幕截图.png")

### 报错信息

日志：
```log
18250 silly saveTree     +-- parse5@2.1.5
18250 silly saveTree     `-- weex-styler@0.1.10
18251 warn ace-loader@1.0.11 No repository field.
18252 warn ace-loader@1.0.11 No license field.
18253 verbose type body-timeout
18254 verbose stack FetchError: Response timeout while trying to fetch https://mirrors.huaweicloud.com/repository/npm/webpack (over 15000ms)
18254 verbose stack     at Timeout._onTimeout (F:\ProgramFile\nodejs\node_modules\node_global\node_modules\npm\node_modules\node-fetch-npm\src\body.js:189:16)
18254 verbose stack     at listOnTimeout (internal/timers.js:549:17)
18254 verbose stack     at processTimers (internal/timers.js:492:7)
18255 verbose cwd C:\Users\huqi\AppData\Local\Huawei\Sdk\.temp\PackageOperation02\unzip\js\build-tools\ace-loader
18256 verbose Windows_NT 10.0.19042
18257 verbose argv "C:\\Program Files\\nodejs\\node.exe" "F:\\ProgramFile\\nodejs\\node_modules\\node_global\\node_modules\\npm\\bin\\npm-cli.js" "install" "--timeout=15000" "--fetch-retry-mintimeout=10000" "--fetch-retry-maxtimeout=15000" "--fetch-retries=1" "-d" "--scripts-prepend-node-path=auto"
18258 verbose node v14.3.0
18259 verbose npm  v6.14.5
18260 error Response timeout while trying to fetch https://mirrors.huaweicloud.com/repository/npm/webpack (over 15000ms)
18261 verbose exit [ 1, true ]

```

### 尝试解决

已配置npm镜像：https://mirrors.huaweicloud.com/repository/npm/，但依旧报错
![输入图片说明](https://images.gitee.com/uploads/images/2020/0925/000511_6d05c1e2_1040604.png "屏幕截图.png")

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