Add subscription functionality

new-registration-app/templates/index.html

@@ -8,7 +8,23 @@
         </a>
     </div>
 </div>
+<div class="mb-4">
+  <div class="card bg-success-subtle text-success-emphasis border-0 shadow-sm text-center">
+    <div class="card-body py-4">
+      <i class="bi bi-calendar-heart fs-3 mb-2"></i>
+      <h5 class="card-title mb-2">Nie wieder die Anmeldung vergessen</h5>
+      <p class="card-text small mb-3">
+        Die Dauerhafte Anmeldung gilt für alle kommenden Kochabende.
+      </p>
+      <a href="/subscribe" class="btn btn-light btn-sm fw-semibold px-3">
+        Jetzt dauerhaft Anmelden
+      </a>
+    </div>
+  </div>
+</div>
 <div class="row row-cols-1 row-cols-md-2 row-cols-lg-3 g-4">
+
+
 {% for event in events %}
     <div class="col">
         <div class="card h-100 shadow-sm">