feat: add 'membership-rallly' template and enhance matching

Expanded the template matching condition to support templates starting with "membership". Added a new 'membership-rallly' template that extends the base 'membership' template, providing information about the Rallly Pro benefit for logged-in users and encouraging community support through donations.

This change improves the flexibility of template handling and introduces a specialized membership page aimed at enhancing user experience and engagement.

main.py

@@ -106,7 +106,7 @@ def generate_static_site(development_mode=False, theme="plain"):
         if template_name == "bridges":
             context.update({"bridges": bridges})
 
-        if template_name == "membership":
+        if template_name.startswith("membership"):
             allow_current = development_mode
             finances_month, finances_year = get_latest_month(finances, allow_current)
             finances_period = datetime.date(finances_year, finances_month, 1)

templates/membership-rallly.html

@@ -0,0 +1,11 @@
+{% extends "membership.html" %}
+{% block serviceinfo %}
+    <div class="alert alert-info">
+        <p>
+            <strong>Welcome to Private.coffee!</strong> Rallly Pro is free for all logged-in users. Upon first login, it may take up to five minutes for your account to be upgraded. If you have any issues, please contact us at <a href="mailto:support@private.coffee">support@private.coffee</a>
+        </p>
+        <p>
+            If you find our services useful, please consider supporting us through a donation or becoming a supporting member. This will help us keep our free services running and improve our offerings. See below for more information.
+        </p>
+    </div>
+{% endblock %}

templates/membership.html

@@ -11,6 +11,9 @@
     </p>
   </div>
 
+  {% block serviceinfo %}
+  {% endblock %}
+
   <div class="row">
     <div class="col-md-4 mb-4">
       <div class="card shadow-sm">