npm的镜像替换成淘宝镜像加快node依赖包的安装速度

1.得到原本的镜像地址

npm get registry

结果为: https://registry.npmjs.org/

2.设成淘宝的

npm config set registry http://registry.npm.taobao.org/

2.换成原来的

npm config set registry https://registry.npmjs.org/