expose-fs not getting forwarded

[monsdar]

I want to create a tutorial based on docker-browser-server and command_line_bootcamp. My problem is that my filesystem seemingly does not get shown. Seems as if expose-fs is unable to connect.

I'm running docker-browser-server as a docker-container:

• From https://github.com/monsdar/bootcamp_docker-browser-server
• CMD: CMD docker-browser-server monsdar/bootcamp-baseimage -p 8080
• Run the container: docker run -p 8080:8080 -v /var/run/docker.sock:/var/run/docker.sock monsdar/bootcamp-docker-browser-server

My baseimage is from here

• It uses expose-fs
• It exposes port 8441

When connecting to docker-browser-server a new container gets created successfully (Spawning new container (buj5ijhk4e)), but this container does not map its internal port 8441 to the external port 8441. I guess this is why the frontend does not show any files. Docker maps 8441 to some random port though, which I can curl localhost:12345 on and get the files and paths.

My testing frontend is here: https://monsdar.gitlab.io/bootcamp_test/?id=buj5ijhk4e, based on this repo: https://gitlab.com/monsdar/bootcamp_test

Any idea why this is happening? Is this a port-mapping issue, or am I looking in the wrong direction?