1) npm install 2) nodemon index.js 3) access "localhost:1234"
npm i
nodemon index.js
create file “https://github.com/tquangdo/node-socket-io/blob/master/Procfile“
https://github.com/tquangdo/node-zoom-clone-app/blob/master/memo.txt
heroku buildpacks -a socket-io-dotq
heroku/nodejs