Document Ansible 2.11 base image usage (#5535)

Fixes #5437

Signed-off-by: austin <[email protected]>

Author: asmacdo

website/content/en/docs/building-operators/ansible/reference/ansible-base-images.md

@@ -0,0 +1,33 @@
+---
+title: Ansible Operator Base Images
+linkTitle: Base Images
+weight: 20
+---
+
+Ansible-based operators are built on top of base images built for use
+with the Operator-SDK.
+
+
+## Ansible Versions
+
+There have been some major changes in the Ansible ecosystem, primarily
+the addition of `collections` and the removal of these libraries from
+Ansible core. Ansible 2.9 is the last release of the "old way", with
+forward compatibility for collections. This is the version officially
+supported by the Operator-SDK.
+
+Ansible 2.10 was a transition release, and it is NOT recommended for use
+with operators.
+
+Ansible 2.11 is the future, and Operator-SDK will eventually provide only 2.11 images. Currently, 2.11 base images are in tech-preview.
+See: [ansible-operator-2.11-preview](https://quay.io/repository/operator-framework/ansible-operator-2.11-preview).
+
+## Changing Ansible Operator Base Images
+
+Operators are scaffolded with the latest version of the base image
+(using Ansible 2.9) in the first line of the operator Dockerfile.
+
+`FROM quay.io/operator-framework/ansible-operator:v1.16`
+
+Operator authors who want to try out 2.11 can simply replace their FROM with:
+`FROM quay.io/operator-framework/ansible-operator-2.11-preview:v1.16`