New site banner (#24)

* New site banner

Added file and edited mkdocs.yml to add the banner that announces the new website.

---------

Co-authored-by: Anthony Galassi <[email protected]>

mkdocs.yml

@@ -16,11 +16,13 @@ nav:
 
 theme:
   name: material
+  custom_dir: docs/overrides # - allows use of the uverride/main.html file
   favicon: images/favicon.png
   logo: images/logo.png
   features:
   - navigation.top
   - content.action.edit
+  - announce.dismiss # allows for closing banner
   icon:
     repo: fontawesome/brands/github
     edit: material/pencil

overrides/main.html

@@ -0,0 +1,29 @@
+{% extends "base.html" %}
+
+{% block announce %}
+<div>
+  <style>
+    .announcement {
+      display: grid;
+      place-items: center;
+      text-align: center;
+      padding: 0;
+      margin: 0
+    }
+  </style>
+  <div class="announcement">
+
+    <h2><b>THIS SITE IS BEING MERGED</b><br></h2>
+
+    <h3>
+      The BIDS group is currently finalizing a NEW main website that will merge our existing websites into one central, easy to navigate resource. <br>
+      The <b><a href="https://bids-website.readthedocs.io" target="_blank">New BIDS Website</a> (https://bids-website.readthedocs.io)</b>
+      is still being finalized, but we encourage feedback via the <br>
+      giscus form on the bottom of the main page. <br>
+    </h3>
+
+    Please feel free to submit suggestions or comments as we improve and consolidate our existing BIDS resources.
+
+  </div>
+</div>
+{% endblock %}