Updated docker file

app.py

@@ -23,6 +23,11 @@ app.add_middleware(
 class ChatRequest(BaseModel):
     message: str
 
+@app.get("/")
+def root():
+    return {"message": "Gemma Chat API is running 🚀. Use POST /chat to send messages."}
+
+
 @app.post("/chat")
 async def chat(req: ChatRequest):
     try: