docs: def _set_manifest_data(self, files_list):
          """
          Write manifest files
          :param files_list: list
          :return:
          """
          if files_list:
              data = ",".join(files_list)
              self.s3.put_object(Bucket=self.sitename,
                                 Key=self.manifest_file,
                                 Body=data,
                                 ACL='private')