This proxy supports all the bitly auth provider and in addition to that it has support for Dataporten authentication and group authorization. It also has patch from https://github.com/soellman/oauth2_proxy to add support for websockets.
To run it type simply
docker run -it gurvin/oauth2_proxy -h
Dockerfile is located at https://github.com/gurvindersingh/oauth2_proxy/blob/master/Dockerfile