public void setHostDirectory(String hostDirectory) {
            this.hostDirectory = hostDirectory;
        }
Path to a host directory where the files copied from container need to be placed. If relative path is
provided then project base directory is considered as a base of that relative path. Can be <code>null</code>
meaning the same as empty string. Note that if containerPath points to a directory, then a directory with the
same name will be created in the hostDirectory, i.e. not just content of directory is copied, but the same
name directory is created too.
src/main/java/io/fabric8/maven/docker/config/CopyConfiguration.java