执行Npm构建时，报错提示node-sass下载失败

问题现象

执行Npm构建任务时，日志报如下异常信息：

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.14.1/linux-x64-72_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.14.1/linux-x64-72_binding.node": 

read ECONNRESET

...

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.14.1 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the node-sass@4.14.1 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

原因分析

node-sass的镜像源需要单独设置，如果没有设置，npm默认会去github下载。从软件开发生产线到github的网络不太稳定，容易下载失败。

处理方法

在默认命令npm install之前先加上如下命令，选择使用华为云的mirror源，重新执行构建即可。

npm config set sass_binary_site https://repo.xxcloud.com/node-sass/