Test attaching to a docker container's standard input

Dockerfile

FROM ubuntu

CMD bash -c 'echo -n "Type your name: " && read name && echo -n "Your name is " && echo $name && sleep 4'

# Test commands:
# docker build -t attachtest .
# docker run -d -it --name attachtest-container attachtest
# docker attach attachtest-container
# docker rm -f attachtest-container
# # Output should be the name you typed
# # Now remove the test container
# docker rm -f attachtest-container