How to list files in a stopped Docker container

This answer to another question shows how to start a stopped container with another command. Here are the commands to list files in a stopped container.

1. Commit the stopped container to a new image: test_image.
   • docker commit $CONTAINER_ID test_image
2. Run the new image in a new container with a shell.
   • docker run -ti --entrypoint=sh test_image
3. Run the list file command in the new container.
   • docker exec --privileged $NEW_CONTAINER_ID ls -1 /var/log