Update app.py

app.py

@@ -7,6 +7,9 @@ from llama_index.embeddings.huggingface import HuggingFaceEmbedding
 from sentence_transformers import SentenceTransformer
 import datetime
 import uuid
+from fastapi import FastAPI
+from fastapi.responses import HTMLResponse
+from fastapi.staticfiles import StaticFiles
 import random
 
 # Load environment variables