Daemonize with pm2
$ pm2 start app.js
$ pm2 startup systemd -u pi
(Related: PM2 Raspberry Jessie - Not spawning on boot · Issue #1654 · Unitech/pm2)
$ npm run build --workspace=touitomamout
$ npm run pm2 --workspace=touitomamout
$ npm run pm2:update --workspace=touitomamout