serving: curl: (7) Failed to connect to helloworld-go.default.mydomain.com port 80: Connection refused

Knative on Google Kubernetes Engine - Running this: https://knative.dev/docs/install/any-kubernetes-cluster/

Applying this hello world go: https://knative.dev/docs/serving/samples/hello-world/helloworld-go/

I keep getting: curl: (7) Failed to connect to helloworld-go.default.mydomain.com port 80: Connection refused

kubectl get ksvc helloworld-go   
NAME            URL                                      LATESTCREATED         LATESTREADY           READY   REASON
helloworld-go   http://helloworld-go.default.mydomain.com   helloworld-go-ttgdz   helloworld-go-ttgdz   True 

I have added this for my domain:

apiVersion: v1
kind: ConfigMap
metadata:
  name: config-domain
  namespace: knative-serving
data:
  # example.org will be used for routes having app=prod.
  
  # example.org: |
  #   selector:
  #     app: prod

  # Default value for domain, for routes that does not have app=prod labels.
  # Although it will match all routes, it is the least-specific rule so it
  # will only be used if no other domain matches.
  mydomain.com: |

Tried changing port: 8080 to 80 same result