node-sass安装失败处理办法

参考：
https://npm.taobao.org/mirrors
https://lzw.me/a/node-sass-install-helper.html

设置环境变量安装

SASS_BINARY_SITE=http://npm.taobao.org/mirrors/node-sass npm install node-sass

或npm config

npm config set sass_binary_site https://npm.taobao.org/mirrors/node-sass/