code: def config_path_from_environment() -> Optional[str]:
      config_dir = os.environ.get("DOCKER_CONFIG")
      if not config_dir:
          return None
      return os.path.join(
          config_dir, os.path.basename(DOCKER_CONFIG_FILENAME)
      )
  
imports: import base64
  import json
  import logging
  import os
  import platform
  from typing import Any, Dict, Mapping, Optional, Tuple, Union
  import dockerpycreds
label_desc: Use image node_id 2 for calling a global function with example usage: config_path_from_environment() and returns: os, None