npm config get registry查看下载地址，默认是https://registry.npmjs.org/
这是国外的地址，npm下载很慢
npm config set registry https://registry.npmmirror.com/使用此指令，修改为淘宝镜像，输入指令后检查是否修改成功
npm config get registry此处返回https://registry.npmmirror.com/
此处再下载就会快很多