title: Font Awesome 5 Icons showing up as square in Flask app
body: <p>I want to use Font Awesome 5 in my flask application, but the templates just show empty squares or other icons then i wanted them to be/not showing anything.</p>
  
  <p>I downloaded fontawesome5 and put it in the static folder. With </p>
  
  <pre><code>&lt;link rel='stylesheet' href="{{ url_for('static', filename='font-awesome5/css/fontawesome.min.css')}}"&gt;
  </code></pre>
  
  <p>i link to the css-file.</p>
  
  <p>When using</p>
  
  <pre><code>&lt;i class="fab fa-bell"&gt;&lt;/i&gt;
  </code></pre>
  
  <p>webapp shows:</p>
  
  <p><img src="https://i.stack.imgur.com/SKhWH.png" alt="empty square"></p>
  
  <p>It doesnt matter if i use fa or fab or fas. </p>
  
  <p>There were no problems with Font Awesome 4. </p>
  
  <p>What am i missing?</p>
  
  <p>Edit:
  <img src="https://i.stack.imgur.com/3Inac.png" alt="import"></p>
  
  <p>Font-weight 400, 600 and 900 is not working.</p>
  
  <p>I can access the font-awesome.min.css and there is a fa-bell with code f0f3, so import should be okey?
  Do I have to set the font-family somewhere in my flask app?</p>