npm指向淘宝源

# 临时使用
npm --registry https://registry.npmmirror.com install express1

# 永久使用
npm config set registry https://registry.npmmirror.com

$ npm config get registry
https://registry.npmmirror.com  //成功返回

$ npm info express

express@4.16.4 | MIT | deps: 30 | versions: 261   //成功返回
Fast, unopinionated, minimalist web framework
http://expressjs.com/

dist
.tarball https://registry.npmmirror.com/express/download/express-4.16.4.tgz
.shasum: fddef61926109e24c515ea97fd2f1bdbf62df12e
....

npm install -g cnpm --registry=https://registry.npmmirror.com