Documentation📄: Add instructions for local v remote registries in cluster installation

[joewxboy]

What is the current documentation state?

On the Cluster Installation page, we assume a local image registry will be used. The codebase now supports remote registries as well. We need to add documentation that covers how to configure a remote registry.

Where is this stated?

No response

Why do you want to improve the statement?

The codebase now supports remote registries as well. We need to add documentation that covers how to configure a remote registry.

Proposed Statement

No response

Additional context.

No response

[euconnor]

The following documentation from our downstream app might be useful in completing this task:

• Remote image registry
• Setup edge cluster local image registry for ocp (links to a section immediately after the “Installing the agent on OCP Kubernetes edge cluster” procedure)