http://ec2-3-34-96-202.ap-northeast-2.compute.amazonaws.com:3000/
// git clone
mkdir <dir_name>
cd <dir_name>
git clone https://github.com/s4ng/coffee.git
//install dependencies
// 1. npm
npm i
//2. yarn
yarn
// dev
yarn dev
//start
yarn start
// git pull
cd backend/
// git remote add origin https://github.com/masillab/backend.git
git fetch
// git pull -u origin master
git pull
// kill running process
ps -ef
sudo kill -9 <running node process ID>
// run new app
sudo nohup node app.js &
// exit
exit