nvm、node、npm、yarn、node-sass的安装

nvm、node、npm、yarn、node-sass的安装

使用NVM安装Node及NPM
https://www.cnblogs.com/Mxy-cnblog/p/10027007.html
npm安装教程
https://www.cnblogs.com/lgx5/p/10732016.html
yarn的安装和使用
https://blog.csdn.net/yw00yw/article/details/81354533
安装node-sass正确姿势
https://www.cnblogs.com/jone-chen/p/14275888.html

error /node_modules/node-sass: Command failed
可能是版本不对应，详见
https://stackoverflow.com/questions/60394291/error-node-modules-node-sass-command-failed