kpack 0.0.6 and Docker Hub secret annotation change for Docker Hub

I decided to try out the 0.0.6 release of kpack and noticed a small change to how you define your registry credentials when using Docker Hub. If you fail to do this it will fail to use Docker Hub as your registry with errors as follows when trying to export the image.

[export] *** Images (sha256:1335a241ab0428043a89626c99ddac8dfb2719b79743652e535898600439e80f):
[export]       pasapples/pbs-demo-image:latest - UNAUTHORIZED: authentication required; [map[Action:pull Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:push Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:pull Class: Name:cloudfoundry/run Type:repository]]
[export]       index.docker.io/pasapples/pbs-demo-image:b1.20200301.232548 - UNAUTHORIZED: authentication required; [map[Action:pull Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:push Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:pull Class: Name:cloudfoundry/run Type:repository]]
[export] ERROR: failed to export: failed to write image to the following tags: [pasapples/pbs-demo-image:latest: UNAUTHORIZED: authentication required; [map[Action:pull Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:push Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:pull Class: Name:cloudfoundry/run Type:repository]]],[index.docker.io/pasapples/pbs-demo-image:b1.20200301.232548: UNAUTHORIZED: authentication required; [map[Action:pull Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:push Class: Name:pasapples/pbs-demo-image Type:repository] map[Action:pull Class: Name:cloudfoundry/run Type:repository]]]

Previously in kpack 0.0.5 you defined your Dockerhub registry as follows:

---
apiVersion: v1
kind: Secret
metadata:
  name: dockerhub
  annotations:
    build.pivotal.io/docker: index.docker.io
type: kubernetes.io/basic-auth
stringData:
  username: dockerhub-user
  password: ...

Now with kpack 0.0.6 you need to define the "annotations" using an url with HTTPS and "/v1" appended to the end of the URL as shown below.

---
apiVersion: v1
kind: Secret
metadata:
  name: dockerhub
  annotations:
    build.pivotal.io/docker: https://index.docker.io/v1/
type: kubernetes.io/basic-auth
stringData:
  username: dockerhub-user
  password: ...

More Information

https://github.com/pivotal/kpack