and this port then sends this to docker with port 4567. I have no nginx involved anywhere. How can I make login work in my case?
I'm not familiar with Docker, but something is acting as reverse proxy. You'll have to figure out what it is, and add that header in appropriately.
I have created a Dockerfile and docker-compose yml file to bring up my forum based commodity institute -- currently locate at forum.bamboosnow.com (pre-alpha as of July 21, 2016)