This is by far the nicest solution out there. All the others, plex, etc are resource hogs that want to transcode everything, unlike minidlna, which can run on a router, if needed, without docker, or all that jazz.

People might not like it because bubbleupnp is not open source, but it's a very nice piece of software nonetheless.

BubbleUPNP is so nice that I emailed the author to please consider taking yearly payments instead of the very lenient one-time price of less than €10.

Any tutorial or links on this?

Not at the moment - this would be a good topic for a blog I've been meaning to set up for 10+ years now.