new_contents: 
  from antfarm.base import App
  
  from configparser import ConfigParser
  
  class ConfigApp(App):
      '''
      App sub-class which retrieves various config options from a ini file.
      '''
      def __init__(self, *args, **kwargs):
          config = ConfigParser()
          config.read(kwargs['config_file'])
          for section on config.sections():
              kwargs[section] = dict(config.items(section))
  
          super().__init__(*args, **kwargs)
  
  
subject: Add config mixin