npm常用本地配置，根据需要进行增加
bogon:~ localhost$ npm config list
; cli configs
metrics-registry = "https://registry.npm.taobao.org/"
scope = ""
user-agent = "npm/6.9.0 node/v12.4.0 darwin x64"
; userconfig /Users/localhost/.npmrc
cache = "/Users/localhost/npm/node_cache"
prefix = "/Users/localhost/npm/node_global"
registry = "https://registry.npm.taobao.org/"
; builtin config undefined
; node bin location = /usr/local/Cellar/node/12.4.0/bin/node
; cwd = /Users/localhost
; HOME = /Users/localhost
; "npm config ls -l" to show all defaults.
其他可以参考：https://www.jianshu.com/p/30ef3c874c1e
淘宝镜像：https://npm.taobao.org/
