title: How does one set private environment variables on Firebase hosting?
body: <p>With Divshot shutting down recently, I've switched a number of applications over to Firebase hosting.  Some of these apps connect to external APIs, so I need a way to store private environment variables (for example, a secret key for S3 access) on Firebase hosting - anyone have any ideas?  There's this article - <a href="https://www.firebase.com/blog/2015-10-29-managing-development-environments.html" rel="noreferrer">https://www.firebase.com/blog/2015-10-29-managing-development-environments.html</a> - but that's only for non-private environment variables.</p>
  
  <p>Thanks!</p>