PM2 패키지 설치·실행

npm install -g pm2

pm2 start app.js
pm2 start app.js --watch
pm2 start app.js --watch --no-daemon
pm2 start app.js --watch --ignore-watch="path/to/ignore" --no-daemon

pm2 list
pm2 logs
pm2 stop app
pm2 delete app
pm2 save
pm2 startup