When trying to run Hydrant through docker:

2026-05-04T16:59:27.918437Z  INFO fjall::db: Creating database at /data/hydrant.db
Error:   × FjallError: Io(Os { code: 13, kind: PermissionDenied, message: "Permission
  │ denied" })
  ╰─▶ Permission denied (os error 13)

I think this is because /data is created by root, but the user is set to hydrant. Running chown or not setting USER hydrant should fix this.