Add image of docker admin console to docs.

Add an image of the Docker admin console to the docs, to show readers
how the product looks (a picture says a thousand words).

Signed-off-by: Cesar Talledo <[email protected]>

Author: ctalledo

content/manuals/admin/_index.md

@@ -37,7 +37,11 @@ aliases:
 
 Administrators can manage companies and organizations using the Docker Admin Console, or manage organizations in Docker Hub.
 
-The Docker Admin Console is available for customers with a Docker Business subscription. The [Docker Admin Console](https://admin.docker.com) provides administrators with centralized observability, access management, and controls for their company and organizations. To provide these features, Docker uses the following hierarchy and roles.
+The Docker Admin Console is available for customers with a Docker Business subscription. The [Docker Admin Console](https://admin.docker.com) provides administrators with centralized observability, access management, and controls for their company and organizations.
+
+![Docker admin console](./images/docker-admin-console.png)
+
+To provide these features, Docker uses the following hierarchy and roles.
 
 ![Docker hierarchy](./images/docker-admin-structure.webp)