Rootless podman on dankserver already maps container root (PUID=0) to
the dank user (uid 1000) by default — /proc/<pid>/uid_map reads
0->1000, 1..->100000+. Verified across plex, tautulli, jellyfin,
calibre-web, copyparty, romm. userns_mode: host is unnecessary, and
podman-compose 1.5.0 cannot apply it anyway (compose services run in
pods; --userns and --pod cannot be set together). The real fix for the
never-booted arr stack was chowning the root-owned /opt/<svc>/config
dirs to 1000:1000.
Frank
e4541598ff