only set env var if not present

Author: kelsey-wong

services/chat-backend/src/app.py

@@ -19,7 +19,8 @@
 from src.utils.openapi_converter import convert_openapi_spec  # noqa: E402
 
 config = get_settings()
-os.environ["LITELLM_LOCAL_MODEL_COST_MAP"] = str(config.LITELLM_LOCAL_MODEL_COST_MAP)
+if not os.environ.get("LITELLM_LOCAL_MODEL_COST_MAP"):
+    os.environ["LITELLM_LOCAL_MODEL_COST_MAP"] = str(config.LITELLM_LOCAL_MODEL_COST_MAP)
 logger = logging.getLogger(__name__)