title: "NODE_ENV" is not recognized as an internal or external command, operable command or batch file
body: <p>I'm trying to setup an environment for a Node.js app. but I'm getting this error every time.</p>
  
  <blockquote>
    <p>"NODE_ENV" is not recognized as an internal or external command,
    operable command or batch file. </p>
  </blockquote>
  
  <p>What does this mean and how can I solve this problem?</p>
  
  <p>I'm using Windows and also tried <code>set NODE_ENV=development</code> but had no luck.</p>