Reinstate jquery

docs/overrides/main.html

@@ -0,0 +1,8 @@
+{% extends "base.html" %}
+
+{% block site_meta %}
+<!-- Place this tag in your head or just before your close body tag. -->
+<script async defer src="https://buttons.github.io/buttons.js"></script>
+<script src="https://code.jquery.com/jquery-3.4.1.min.js"
+  integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
+{% endblock %}

mkdocs.yml

@@ -38,7 +38,7 @@ nav:
 theme:
   name: material
   logo: 'images/logo.png'
-  custom_dir: 'docs'
+  custom_dir: 'docs/overrides'
   palette:
     primary: 'blue grey'
     accent: 'tear'