example imagestream from dockerfile with reference policy

imagestream.yaml

apiVersion: image.openshift.io/v1
kind: ImageStream
metadata:
  name: spark-app-s2i
spec:
  lookupPolicy:
    local: true
  tags:
    - name: latest
      from:
        kind: DockerImage
        name: quay.io/erikerlandson/spark-app-s2i:latest
      referencePolicy:
        type: Local