When running as Daemonset only local messages

[derdanne]

We'd like to run stern as a Daemonset inside a cluster and so we need to limit the messages which will be fetched to the nodes containers the container is running on.

Maybe:

• add flag "--daemonset"
• set environment variable from spec
  - name: NODE_NAME valueFrom: fieldRef: fieldPath: spec.nodeName
• setup watch to limit container logs to NODE_NAME