docs: def images(self):
  
          '''
              a method to list the local docker images
              
          :return: list of dictionaries with available image fields
  
          [ {
              'CREATED': '7 days ago',
              'TAG': 'latest',
              'IMAGE ID': '2298fbaac143',
              'VIRTUAL SIZE': '302.7 MB',
              'REPOSITORY': 'test1'
          } ]
          '''
  
          sys_command = 'docker images'
          sys_output = self.command(sys_command)
          image_list = self._images(sys_output)
  
          return image_list