title: "no versions of image available" for "docker-image"
body: <p>I created a docker image and uploaded to my internal artifactory for concourse pipeline.
  However, when I execute the job, error "no versions of image available" is printed.
  I don't know how could I trace the problem</p>
  
  <p>What did I get wrong? Anyone can help?</p>
  
  <pre><code>- task: build
    config:
      platform: linux
      image_resource:
        type: docker-image
        source:
          repository: artifact.com/oocl/test_iamge
          tag: "latest"
      run:
        path: sh
        args:
        - -exc
        - |
          ping artifact.com -c 5
  </code></pre>