update join_conversation.md and add contributing.md

Author: supernord

_data/sidebars/main.yml

@@ -7,14 +7,10 @@ subitems:
     url: /guides
   - title: External resources
     url: /external_resources
+  - title: Contributing
+    url: /contributing
   - title: Contributors
     url: /contributors
-  - title: Contributing
-    subitems: 
-    - title: Provide us your document 
-      url: /provide_documentation
-    - title: Write your own guides 
-      url: /guide_template
   - title: Events
     url: /events
   - title: News

contributing/contributing.md

@@ -0,0 +1,7 @@
+---
+title: Contributing
+page_id: contributing
+type: resources
+---
+
+

index.md

@@ -25,6 +25,7 @@ This website is a virtual meeting place and hub for all users of **computing for
 
 ## Acknowledgements
 
-The projects included here represent a joint effort by the following people at multiple Australian institutions.
+This website represents a joint effort by many people at multiple Australian institutions. 
+A list of contributors is [available here](/contributors).
 
 {% include affiliation-tiles-selection.html %}

pages/join_conversation.md

@@ -2,15 +2,12 @@
 title: Join the conversation
 description: 
 page_id: join
-type: resources
 
 tiles:
   - title: "Quarterly community meetings"
     url: https://docs.google.com/document/d/1miRyOOOW7HeDsCvzJwVEOhaAzPBve8od9WUvsAsFfcw/edit#heading=h.owmugrvs22hi
   - title: "Events"
     url: /events
-  - title: "News"
-    url: /news
 ---
 
 If you would like to, there are multiple ways to join the conversation: