Some useful things with docker

useful_docker.txt

When building a container and having some issues, you can always launch interactively with 
(--rm removes the container when you are done so that you can remove the image if you need to rebuild):

docker run --rm -it --entrypoint=/bin/bash <my-container>

Remember that the default 'bridge' network does not allow hostname resolution. To resolve host names, you need to 
create a user network and ensure the containers attatch to that.