display version or env in footer

src/servala/frontend/templates/frontend/base.html

@@ -65,6 +65,8 @@
                         <div class="float-end">
                             <p>
                                 Crafted with <span class="text-danger"><i class="bi bi-heart-fill icon-mid"></i></span> in Zurich
+                                {% load version_tags %}
+                                - {% get_version_or_env %}
                             </p>
                         </div>
                     </div>

src/servala/frontend/templatetags/version_tags.py

@@ -0,0 +1,14 @@
+import os
+from django import template
+from servala.__about__ import __version__
+
+register = template.Library()
+
+
+@register.simple_tag
+def get_version_or_env():
+    """Return version number in production, environment name otherwise."""
+    env = os.environ.get('SERVALA_ENVIRONMENT', 'development')
+    if env == 'production':
+        return __version__
+    return env