title: require process.env in node.js?
body: <p>I have a <code>.env</code> file and it has </p>
  
  <p><code>ABC='abc'</code></p>
  
  <p>and when I do <code>process.env.ABC</code> in my app.js I can get the <code>abc</code> value. How do I require it to be use in my models' files? I do the same thing <code>process.env.ABC</code> in my models file, it got undefined. I assume I have to require it?</p>