title: Enviroment variables in node application
body: <p>while developing my app i've been using the dotenv package to fake enviroment variables. </p>
  
  <pre><code>require('dotenv').config({path : '../../../config/.env'});
  const jwtSecret = process.env.JWT_SECRET; 
  </code></pre>
  
  <p>What will happen when i push to my live server with these? How will I handle the enviroment variables then? </p>