Add new file

_includes/pretix.html

+<div class="pretix-widget-compat" event="https://pretix.chaotikum.org/chaotikum/{{ include.id }}/"></div>
+<noscript>
+   <div class="pretix-widget">
+        <div class="pretix-widget-info-message">
+                JavaScript is disabled in your browser. To access our ticket shop without JavaScript, please <a target="_blank" rel="noopener" href="https://pretix.chaotikum.org/chaotikum/{{ include.id }}/">click here</a>.
+                </div>
+    </div>
+</noscript>