Is there a self-hostable BitTorrent tracker that can run with Docker? I know there's an option on qBittorrent but I don't want my server to run a full BitTorrent client; just the tracker.
What features are you looking for specifically? If you just want like a really basic index, hosting a JSON file with a object where the key is the infohash and the value is the metadata is a really simple approach :)
I've heard of this, but I don't mind anyone with the tracker URI to be able to connect to it. sqtracker is a full-blown system to run a private tracker with user and ratio management, which is overkill in my case.