[dexter-server] Management Guide for Dexter Server (using PM2)

[Minjung-Baek]

P(rocess) M(anager) 2

PM2 embeds a simple and powerful module system.
PM2 is a production process manager for Node.js applications with a built-in load balancer.
It allows you to keep applications alive forever, to reload them without downtime and to facilitate common system admin tasks.