title: Semantic UI doesn't apply the theme specified in theme.config
body: <p><strong>What Do I want to achieve?</strong></p>
  <p>I want to add a button in my App.js file. It should be the button from the theme, that I've specified in the theme.config file.</p>
  <p>First want to say, that I've read this question from stack overflow already: <a href="https://stackoverflow.com/questions/27213694/semantic-ui-change-theme">Semantic UI - Change Theme</a></p>
  <p>I've tried the steps from the answer, but those didn't help me.</p>
  <p>And I've read the documentation:
  <a href="https://semantic-ui.com/usage/theming.html" rel="nofollow noreferrer">https://semantic-ui.com/usage/theming.html</a></p>
  <p>As far as I understand, I need to change the value which is specified in the theme.config file. This file is located in</p>
  <p><strong>projectFolder/semantic/src/theme.config</strong></p>
  <p>In the theme.config file, there is this global variable @site. I changed this to 'github', ran a gulp build (as written in the SO answer, which is provided at the beginning of the question), and reloaded the dev server. But I still see the default button.</p>
  <pre><code>/* Global */
  @site        : 'github';
  @reset       : 'default';
  </code></pre>
  <p>I've changed also the value of the button variable to 'github'. But that doesn't work too.</p>
  <pre><code>/* Elements */
  @button      : 'github';
  </code></pre>
  <p><strong>App.js file</strong></p>
  <pre><code>class App extends Component {
    render() {
      return (
        &lt;div className=&quot;App&quot;&gt;
          &lt;Button&gt;Click here&lt;/Button&gt;
        &lt;/div&gt;
      );
    }
  }
  </code></pre>
  <p>In my <strong>index.js</strong> file I've also imported semantic-ui-css. Is there something else to import?</p>
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import './index.css';
  import App from './App';
  import 'semantic-ui-css/semantic.min.css';
  
  ReactDOM.render(&lt;App /&gt;, document.getElementById('root'));
  </code></pre>