fix

app.py

@@ -56,6 +56,10 @@ except Exception as e:
 # -----------------------------------------------------------------------------
 app = FastAPI(title="Gemma3-4B-IT Q4_0 GGUF API")
 
+@app.get("/")
+async def read_root():
+    return {"message": "Gemma3 API is running"}
+
 class GenerationRequest(BaseModel):
     prompt: str
     max_new_tokens: int = 128