Update app.py

app.py

@@ -9,6 +9,10 @@ app = FastAPI()
 class Query(BaseModel):
     query: str
 
+@app.get("/")
+def root():
+    return {"message": "FastAPI backend is running!"}
+
 @app.post("/ask")
 def ask_question(query: Query):
     result = llm_chain.invoke({"query": query.query})