title: How to customize interface of Rocket Chat
body: <p>I need to make some changes to the front-end of RocketChat. I've done a manual install on Ubuntu 16.04 and am new to the JS ecosystem. Simply editing files (such as <code>programs/server/packages/rocketchat_lib.js</code>) and redoing <code>npm install</code> doesn't seem to work.</p>
  
  <p>How can this be done?</p>