设置npm的镜像地址
npm config set registry https://registry.npmjs.org
npm config set registry https://registry.npm.taobao.org
查看npm当前镜像地址：
npm config get registry
npm镜像地址设置和查看
npm config set registry https://registry.npmjs.org
npm config set registry https://registry.npm.taobao.orgnpm config get registry