As a customer
I want to know how to configure the Network Policies
so that the SDP is able to run properly.

The ingress and egress communication of pods can be restricted with Network Policies. It is useful to isolate pods and namespaces to improve security. However, some connections are required for the SDP to work correctly. These minimum requirements must be documented.

Additionally, documentation should also be added for product-specific network policies:

• The Superset Operator connects to Superset Stacklets if a DruidConnection is added
• The ZooKeeper Operator connects to ZooKeeper Stacklets to manage ZNodes
• The NiFi Operator creates a Job that connects to the NiFi Stacklet to do something
• The OPA bundle builder reads Kubernetes resources, but is inside the OPA DaemonSet
• Some component of Kubernetes needs to be able to talk to our webhooks, see internal server error from secret-operator pod trying to convert secret classes secret-operator#673

We could also document that all operators need access to their managed product. (How would that work with jobs?). Needs to still be decided.

Documentation should be very specific, ideally we can provide skeleton NetworkPolicies.