when copying files to tmp-dir ready to tar-pipe them, only create sub-dir if there is one
when copying files to tmp-dir ready to tar-pipe them, only create sub-dir if there is one

cyber-dojo/runner_stateless,cyber-dojo/runner,cyber-dojo/runner_stateless,cyber-dojo/runner,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless