added comment

cbutil/get_job_info.py

@@ -11,6 +11,7 @@ logger = logging.getLogger(__file__)
 
 
 def load_from_env(env_path=".env"):
+    """Loads by default the predefinded varialbes form the Gitlab CI."""
     if os.path.exists(env_path):
         dotenv.load_dotenv(env_path)
     return os.environ["CI_API_V4_URL"], os.environ["CI_PROJECT_ID"], os.environ["CI_PIPELINE_ID"]