https://docs.aws.amazon.com/systems-manager/latest/userguide/ssm-agent.html
https://docs.aws.amazon.com/systems-manager/latest/userguide/session-manager-working-with-sessions-start.html#sessions-start-ssh
https://docs.aws.amazon.com/systems-manager/latest/userguide/session-manager-getting-started-enable-ssh-connections.html
