That's it. Don't forget to go to unRAID Settings >> click on Fix Common Problems (if the scan doesn't start automatically then click RESCAN) and you will receive a notification to apply a fix for *.xml file change.
I just went through this procedure and can verify everything went smooth and well.
[support] Vaultwarden (formerly Bitwarden_rs)
in Docker Containers
Posted
Worked for me. Thanks for detailed procedure.