searx/searx/templates/courgette/github_ribbon.html

<a href="https://github.com/searx/searx" class="github">
    <img style="position: absolute; top: 0; right: 0; border: 0;" src="{{ url_for('static', filename='img/github_ribbon.png') }}" alt="Fork me on GitHub"  class="github"/>
</a>