https://github.com/mozilla-services/syncstorage-rs?tab=readme-ov-file#local-setup
I can’t speak to the quality of this repo, but at first glance it seems to make running it in Docker pretty easy: https://github.com/dan-r/syncstorage-rs-docker
It looks like a number of people have done something similar: https://hub.docker.com/search?q=syncstorage-rs