I just committed fixes to https://gitlab.com/fschaeckermann/hummingbird.git that now make the hummingbird client run in an Alpine Linux container as well.
The produced image of Dockerfile.alpine is merely 23.6MB in size… good enough for a service container with a single purpose I guess.
Next is to look closer at what happens with IPv6 in a docker container. There seems to be some kind of permission problem…