How do I can I backup my world save from my ITZG Docker container?

I have a minecraft server that is working ok for me right now, I want to be able to backup the world save so I can rebuild the server in case anything happens or I find a better way to make the server.

Edit: I forgot to mention, is there any way for me to delete the save from the docker to generate a new world or do I have to delete + remake the data directory every time?
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