How to update to new snapshot without deleting current world progres and data

[HACKERPRO908]

I have a physical server box thing hosting a Minecraft java server with docker but I want to update from 1.21.X to the new snapshot with all the creaking and the new biome without deleting my buildings and removing my inventory progress so how do I do it?
SNAPSHOT the snapshot is 24W40A and future 1.22 updates

[itzg]

It'll depend how you created the container and if you used a volume mount for /data. If using a compose file it's as simple as setting VERSION to "SNAPSHOT" and applying with the command docker compose up -d.

Take a backup before you do anything though since some of the snapshot world changes might be destructive.