curl -sL https://rpm.nodesource.com/setup_12.x | bash - yum install nodejs安装yarn
curl -sL https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo yum install yarn更换淘宝源
npm config set registry https://registry.npm.taobao.org
查看是否更换成功：
npm config get registry
如果要更换回官方源：
npm config set registry https://registry.npmjs.org参考
安装1
