Document Namespace Security Network Policy

[osterman]

what

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: test-network-policy
  namespace: foobar
Spec:
  policyTypes:
  - Ingress
  podSelector: {}
  ingress:
  - from:
    - namespaceSelector:
        matchLabels:
          name: foobar