3-2-1 rule with restic. Check it out.

ReadyMedia (formerly MiniDLNA) works fine for me as a container via podman on a raspberry pi.

podman run -d --name=minidlna \
--net host \
-v dir/to/music:/media/audio \
-e MINIDLNA_MEDIA_DIR_1=A,/media/audio \
-e MINIDLNA_FRIENDLY_NAME=Music \
--restart on-failure:3 \
--platform linux/arm64 \
docker.io/vladgh/minidlna:latest

No http interface though for playback. Still very simple and does the job for me.