Add_docker_metadata filter desired fields

It would be great to be able to select which fields we want from add_docker_metadata prospector

I'm doing currently:

processors:
  - add_docker_metadata: ~
  - drop_fields:
      fields: ["input.type", "prospector.type", "docker.container.id", "docker.container.labels.com.docker.stack.namespace", "docker.container.labels.com.docker.swarm.node.id", "docker.container.labels.com.docker.swarm.service.id", "docker.container.labels.com.docker.swarm.service.name", "docker.container.labels.com.docker.swarm.task.id", "docker.container.labels.com.docker.swarm.task.name", "docker.container.labels.com.docker.swarm.task.value"]

What I'd like is:

processors:
  - add_docker_metadata:
      fields: ["docker.container.image", "docker.container.name"]

@caub Its a valid request, can you create an issue on issue tracker at http://github.com/elastic/beats?

Ok, thanks https://github.com/elastic/beats/issues/8049

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