Gravitational CTO, Sasha Klizhentas, goes through the best practices for setting up privileged access management when using SSH to access cloud-native server infrastructure. He also describes how these concepts are applied to Teleport - privileged access management for elastic infrastructure that doesn't get in the way.
Gravitational CTO, Sasha Klizhentas, gives an introduction of Docker and goes through the basic concepts. You can also go through this workshop online at https://github.com/gravitational/workshop/blob/master/docker.md.