Ever needed to extract the files in a Docker container?
Docker provides the save sub-command.
Exporting Docker files into a Tar Archive
The examples below use a Docker container called: aoms/hellojava
Swap this out with your own container as required.
docker save aoms/hellojava > hellojava.tar
hellojava.tar now contains a list of files found in the Docker image.
Taking it one step further
You can make this a bit better by extracting it into a new directory and untarring automatically:
mkdir tmpimage && cd $_ && docker save aoms/hellojava > _out.tar && tar -xvf _out.tar && open .