Update app.py

app.py

@@ -72,9 +72,9 @@ async def start_chat():
     }
     cl.user_session.set("settings", settings)
 
-    embeddings = OpenAIEmbeddings()
+    embeddings = OpenAIEmbeddings("text-embedding-3-small")
     # Create a vector store
-    vector_db = VectorDatabase()
+    vector_db = VectorDatabase(embedding_model = embeddings)
     vector_db = await vector_db.abuild_from_list(split_documents_NIST)
     vector_db = await vector_db.abuild_from_list(split_documents_Blueprint)