The default image is exposing RPC API, if that's not something you want to, make sure to remove 26657 from the deploy.yaml file.
By default, the image is setting the moniker to the container name, use vidulumd start --help in order to see what you can customize should you need to.
If you plan to register a validator, make sure you back-up the priv_validator_key.json & node_key.json in the /root/.vidulum/config directory.