yarn 设置源及代理

配置国内镜像-淘宝镜像
yarn config set registry https://registry.npm.taobao.org

设置代理
yarn config set proxy http://username:password@server:port
yarn confit set https-proxy http://username:password@server:port

例：npm config set https-proxy http://xiaoming:123456@192.168.1.1:8080

取消代理
yarn config delete proxy
yarn config delete https-proxy