show second button in winter

templates/index.html.tera

@@ -12,6 +12,15 @@
                     <span class="text-xl px-3">Geplante Ausfahrten</span>
                 </a>
             </div>
+	    {% if show_quick_ergo_button %}
+            <div class="m-auto">
+                <a href="/ergo"
+                   class="btn btn-primary flex items-center justify-center">
+                    {% include "includes/rowing-icon" %}
+                    <span class="text-xl px-3">Ergo-Challenge</span>
+                </a>
+            </div>
+	    {% endif %}
             {% if notifications %}
                 <div id="notification"
                      class="bg-white dark:bg-primary-900 text-black dark:text-white rounded-md block shadow mt-5"