selenium grid 4 grid-docker - how to configure for TLS on port 2376

[Joel Kruse]

On Ubuntu v20.04 using Docker v20.10.12 and systemd controlling docker.service I get a docker.service error when Docker is configured (via service override) to expose port 2375 on tcp.  This configuration (when working) allows the selenium-docker to control starting the browser containers.  It seems Docker doesn't want to allow unsecure tcp connections to the daemon anymore. :(

Docker has instructions for setting up CA/server/client certificates at https://docs.docker.com/engine/security/protect-access/

My question is, how do I get the selenium-docker image to use the CA and client certs to connect to the Docker daemon?