References: https://github.com/docker/docker-ce/blob/v18.03.0-ce-rc3/CHANGELOG.md https://github.com/docker/cli/pull/896 https://github.com/moby/moby/pull/33702 https://github.com/moby/moby/pull/36366 https://github.com/docker/swarmkit/pull/2133 Possible doc locations: https://docs.docker.com/engine/swarm/secrets/
