title: Heroku can't update CSS
body: <p>I want to update my project on Heroku. </p>
  
  <p>I have used:</p>
  
  <pre><code>git add .
  git commit -m "aaa"
  git push origin master
  </code></pre>
  
  <p>and then on Heroku website i deployed code from Github. Everything has been updated but CSS stayed not updated. Locally and on Github I can see new version of CSS file. What should i do? I have only found solutions for Ruby on Rails, not Java EE.</p>