code: def running_in_docker():
      # Docker creates a file named /.dockerenv in all supported versions
      return Path("/.dockerenv").exists()
  
imports: from __future__ import annotations
  import platform
  import sys
  from pathlib import Path
  from subprocess import CompletedProcess, run
  import pytest
  from ocrmypdf import api, pdfinfo
  from ocrmypdf._exec import unpaper
  from ocrmypdf._plugin_manager import get_parser_options_plugins
  from ocrmypdf.exceptions import ExitCode
label_desc: Use image node_id 3 for calling a global function with example usage: running_in_docker() and returns: Path