Don't think git as a sync storage, more like to merge works.

If you need to share files between computers use a shared storage.

Always use the right tool for the job. Mount a shared storage or use synctools rsync, etc

https://github.com/axllent/mailpit

Just for you to known, they store the compose file. It's in their compose folder on the data volume.

https://github.com/jdx/mise

They will don't care, not their money, not their job. Can't blame them