title: how to force browsers reload static assets after code deployment?
body: <p>I'm running the following setup: haproxy -> web traffic -> varnish -> nginx (serve static assets) -> node.js (dynamic content) and haproxy -> websockets -> node.js</p>
  
  <p>How can I force browsers to refresh static assets (JavaScript, CSS, ..) after code deployment? (expire/purge the cache?)</p>