Refactor handler.py to use relative path for model initialization

handler.py

@@ -8,7 +8,7 @@ class EndpointHandler():
     def __init__(self, path="."):
         # load the optimized model
         # モデルの準備
-        self.model = BGEM3FlagModel(path, use_fp16=False)
+        self.model = BGEM3FlagModel(path, use_fp16=True)
 
 
     def __call__(self, data: Any) -> List[List[Dict[str, float]]]: