update log server

constants.py

@@ -12,7 +12,7 @@ SERVER_PORT = os.getenv("SERVER_PORT", 7860)
 ROOT_PATH = os.getenv("ROOT_PATH", None)
 ELO_RESULTS_DIR = os.getenv("ELO_RESULTS_DIR", "./arena_elo/results/latest")
 
-LOG_SERVER = os.getenv("LOG_SERVER", None)
+LOG_SERVER = os.getenv("LOG_SERVER", "http://2.0.0.1:8800")
 LOG_SERVER_SUBDOAMIN = os.getenv("LOG_SERVER_SUBDIR", "GenAI-Arena-hf-logs")
 LOG_SERVER_ADDR = os.getenv("LOG_SERVER_ADDR", f"{LOG_SERVER}/{LOG_SERVER_SUBDOAMIN}")
 # LOG SERVER API ENDPOINTS