old_contents: from django.conf import settings
  from rest_framework.settings import APISettings
  import os
  
  DEFAULTS = {
      'GATEWAY_ROOT_PATH': getattr(
          settings, 'GATEWAY_ROOT_PATH', os.environ.get('GATEWAY_ROOT_PATH', 'http://gateway:3000/'))
  }
  
  zc_settings = APISettings(None, DEFAULTS, None)
  
new_contents: from django.conf import settings
  from rest_framework.settings import APISettings
  import os
  
  DEFAULTS = {
      'GATEWAY_ROOT_PATH': getattr(
          settings, 'GATEWAY_ROOT_PATH', os.environ.get('GATEWAY_ROOT_PATH', 'http://gateway:4000/'))
  }
  
  zc_settings = APISettings(None, DEFAULTS, None)
  
subject: Update default gateway port for local development