docs: def create(cli, command, docker_id):
          """Creates waybill shims from a given command name and docker image"""
          content = waybill_template.format(command=command,
                                            docker_id=docker_id)
          waybill_dir = cli.get_waybill_dir()
          waybill_filename = os.path.join(waybill_dir, command + '.waybill')
          with open(waybill_filename, 'wb') as filehandle:
              filehandle.write(content)
          cli.log.info('Created waybill {0}'.format(waybill_filename))