Secrets management

[woodsb02]

It would be nice to be able to manage podman secrets.

It would also be good to be able to use existing secrets when configuring other settings (such as in the value of environment variables when creating a container).

$ podman secret --help
Manage secrets

Description:
  Manage secrets

Usage:
  podman secret [command]

Available Commands:
  create      Create a new secret
  exists      Check if a secret exists in local storage
  inspect     Inspect a secret
  ls          List secrets
  rm          Remove one or more secrets