title: AWS EC2: keep running node.js after exit console
body: <p>I use aws ec2 to host web server with node.js and apache.</p>
  
  <p>So far, I always need to login ec2 through terminal to run <code>npm start</code>.</p>
  
  <p>I wanna make it keep running even if Im not on terminal. How am I supposed to setup for it?</p>
  
  <p>I turned on <code>https</code>, but nothing happened.</p>
  
  <p>I appreciate it in advance.</p>