title: VSTS npm unable to set NODE_ENV
body: <p>I am unable to set NODE_ENV in VSO release management. In development the npm script runs fine.</p>
  
  <pre><code>"start:dev": "SET NODE_ENV=development&amp;&amp;gulp dev-serve"
  </code></pre>
  
  <p>But in VS Team Services release management when I run the npm task with the command I get an error that the command is unrecognized.</p>
  
  <pre><code>"start:prod": "SET NODE_ENV=production&amp;&amp;gulp prod-serve"
  </code></pre>
  
  <p>How do I set NODE_ENV in production? </p>