Modify docs landing page

Signed-off-by: Pedro Ielpi <pielpi@opennebula.io>

Author: pedroielpi3

content/docs/_index.md

@@ -8,12 +8,14 @@ hide_feedback: true
 no_list: true
 breadcrumb_disable: true
 Description: >
-  At-a-glance overview of the OpenNebula Docs
+
 ---
 
 [OpenNebula](https://opennebula.io) is a powerful, but easy-to-use open source platform for enterprise, private, hybrid or edge cloud infrastructure. OpenNebula focuses on simplicity, flexibility, scalability and vendor independence.
 
-This site contains the OpenNebula technical documentation, divided into the sections listed below.
+This site contains the OpenNebula technical documentation. For additional resources, see the [OpenNebula Community Forum](https://forum.opennebula.io/) and [blog](https://opennebula.io/blog/).
+
+To access additional material including white papers, guides and screencasts, see [Official Guides](https://opennebula.io/docs/).
 
 {{< cardpane >}}
   {{< card header="[Quick Start](/docs/quick_start)" >}}