So I am trying to get into docker latley and everything seems to be pretty forward and understandable.
Is there a command to show which container is connected to which network?
this should be what you are looking for
Had a similar problem at work, i extrapolated the ip using something like, but forgot the exact command.
docker inspect --format '{{ .NetworkSettings.IPAddress }}'
theres a whole bunch of information you can get from the containers in the man pages this way.
alternately you can just execute /bin/bash or which ever directly into the container and do a 'ip a' which should return its current network settings.
sudo docker exec -i -t some_container /bin/bash
something to this affect. again forgot the exact command, google foo gets you far though.