How to SSH into Docker URsim?

I have setup the universalrobots/ursim_e-series docker container (Link)
I am now trying to access this container and the file system via ssh.
How should this be done ideally?

I have remapped the the docker container port 22 to the host port 2223.
I can not access the docker container from another pc in the network via `ssh -p 2223 root@HOSTIP`.
SSH is activated in the robot settings. but it seems like no ssh service is running on the docker container, the connection is refused before credentials are checked.

What am I missing?

Not sure if this is the only solution but I ended up creating Dockerfiles that manually add an ssh server and run it with the default password (easybot) on Port 2223 (because 22 is used by the docker-host machine and 2222 is used for something else)

you can find the dockerfiles here: