npm 查看当前源
npm get registry
npm 设置其他源
npm config set registry https://registry.npmjs.org
yarn 查看当前源
yarn config get registry
yarn 恢复（设置）默认源
yarn config set registry https://registry.yarnpkg.com
镜像源地址部分如下：
-
npm --- https://registry.npmjs.org/
-
yarn --- https://registry.yarnpkg.com/
先记录常用的，欢迎各位大佬补充
