Adding in an announcement bar

Author: DsposalTom

mkdocs.yml

@@ -1,7 +1,8 @@
 site_name: Open3P
-site_description: Open3P is an open data standard for the plastic value chain.
+site_description: Open3P is an open data standard for the packaging value chain.
 theme:
   name: material
+  custom_dir: overrides
   favicon: img/favicon-192.png
   icon:
     repo: fontawesome/brands/git-alt

overrides/main.html

@@ -0,0 +1,6 @@
+<!-- Announcement bar -->
+{% extends "base.html" %}
+
+{% block announce %}
+<p>The current version of Open 3P data standard for packaging is focussed on plastic. We are currently working to extend it to all packaging materials.</p>
+{% endblock %}