add custom handler again

handler.py

@@ -0,0 +1,13 @@
+from typing import Dict, List, Any
+from InstructorEmbedding import INSTRUCTOR
+
+class EndpointHandler():
+    def __init__(self, path=""):
+        self.model = INSTRUCTOR(path)
+
+    def __call__(self, data: Dict[str, Any]) -> List[Dict[str, Any]]:
+        instruction = data.get("instruction", "")
+        document = data.get("document", "")
+        embedding = self.model.encode([[instruction, document]]).flatten()
+
+        return [{"embedding": embedding}]