Add outdated warning in docs

docs-overrides/outdated.html

@@ -0,0 +1,8 @@
+{% extends "base.html" %}
+
+{% block outdated %}
+  You're not viewing the latest version.
+  <a href="{{ '../' ~ base_url }}">
+    <strong>Click here to go to latest.</strong>
+  </a>
+{% endblock %}

mkdocs.yml

@@ -3,6 +3,7 @@ site_description: Ready-to-use and customizable users management for FastAPI
 
 theme:
   name: 'material'
+  custom_dir: docs-overrides
   palette:
     - scheme: default
       primary: 'red'