npm/testpolicies/allow-backend-to-frontend.yaml

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: deny-all-policy
  namespace: testnamespace
spec:
  podSelector:
    matchLabels:
      app: "backend"
  ingress:
    - from:
        - podSelector:
            matchLabels:
              app: frontend
  policyTypes:
    - Ingress