install npm install run node app.js intro https://mp.weixin.qq.com/s?__biz=MzA5NzM0MDgwNQ==&mid=2648148571&idx=1&sn=94cfe11b04ce934669796cfc31a61aeb&chksm=888176b1bff6ffa798f893542d6e969e06a60b437a6469f1c8a15d76784d4d4a92facc2ce381#rd