Update ping.py

added @app .head("/ping")

ping.py

@@ -6,6 +6,7 @@ def add_ping_route(app: FastAPI, call_langflow):
     Calls the provided call_langflow function with a test message to verify it's working.
     """
     @app.get("/ping")
+    @app.head("/ping")
     def ping():
         """Simple health check that also calls the chat function."""
         try: