The image used was created by itzg. For all variable descriptions, go there.
Change the volumes.hostPath.path to the directory where you want to save and access all the data available to Minecraft. If you do not want or need direct access, you can instead use:
volumes:
- name: data
persistentVolumeClaim:
claimName: minecraft-data
Start Minecraft
podman play kube --configmap=secrets.yaml pod.yaml
Stop Minecraft
podman play kube --down pod.yaml
To update Minecraft, aka. use the newest container, just stop and start again.