title: Mean.js: why is Gulp overwriting changes to production.js
body: <p>Starting my Mean.js application using <code>gulp prod</code> is overwriting my changes to production.js. I edit the file, save it, commit it, whatever, and when I run <code>gulp prod</code> it immediately reverts to the state it was before I edited, linting errors and all. This is config/assets/production.js, which as far as I know is a source file, not something I'd expect to be generated.</p>
  
  <p>I've searched the docs and the code to try to figure out what's happening, but I'm not getting it. Any hints?</p>