Add an apko build task for minimal or even distroless docker images.

[ernstvonoelsen]

Changes

Add an apko build task for minimal or even distroless docker images.

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These are the criteria that every PR should meet, please check them off as you
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• Follows the authoring recommendations
• Includes docs (if user facing)
• Includes tests (for new tasks or changed functionality)
  • See the end-to-end testing documentation for guidance and CI details.
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  • File path follows <kind>/<name>/<version>/name.yaml

  • Has README.md at <kind>/<name>/<version>/README.md

  • Has mandatory metadata.labels - app.kubernetes.io/version the same as the <version> of the resource

  • Has mandatory metadata.annotations tekton.dev/pipelines.minVersion

  • mandatory spec.description follows the convention

      ```
    
      spec:
        description: >-
          one line summary of the resource
    
          Paragraph(s) to describe the resource.
      ```
    

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[linux-foundation-easycla]

• ✅login: ernstvonoelsen / (b1708b2)
• ✅login: ernstvonoelsen / (b1708b2, a68d4e5)
• ✅login: ernstvonoelsen / (b1708b2, a68d4e5, 5c19979)

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[tekton-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[tekton-robot]

Hi @ernstvonoelsen. Thanks for your PR.

I'm waiting for a tektoncd member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[ernstvonoelsen]

/kind feature