docs: def get_service_from_port(port, all_services=None):
      """Gets the name of the service from the port
      all_services allows you to feed in the services to look through, pass
      in a dict of service names to service information eg.
      {
          'service_name': {
              'port': port_number
          }
      }
      
      Returns the name of the service
      """
      if port is None or not isinstance(port, int):
          return None
  
      if all_services is None:
          all_services = read_services_configuration()
  
      for name, info in all_services.items():
          srv_port = info.get('port')
          if srv_port is not None and port == int(srv_port):
              return name
  
          for elem in info.get('smartstack', {}).values():
              elem_port = elem.get('proxy_port')
              if elem_port is not None and port == int(elem_port):
                  return name