docs: def ps(self):
  
          '''
              a method to list the local active docker containers 
              
          :return: list of dictionaries with active container fields
  
          [{
              'CREATED': '6 minutes ago',
              'NAMES': 'flask',
              'PORTS': '0.0.0.0:5000->5000/tcp',
              'CONTAINER ID': '38eb0bbeb2e5',
              'STATUS': 'Up 6 minutes',
              'COMMAND': '"gunicorn --chdir ser"',
              'IMAGE': 'rc42/flaskserver'
          }]
          '''
  
          sys_command = 'docker ps -a'
          sys_output = self.command(sys_command)
          container_list = self._ps(sys_output)
  
          return container_list