feat: add welcome endpoint returning a Hello World message

app.py

@@ -515,6 +515,11 @@ def create_gradio_app():
     return demo
 
 
+@app.get("/")
+async def welcome() -> dict:
+    return { "message": "Hello World"}
+
+
 # Mount Gradio app
 gradio_app = create_gradio_app()
 app = gr.mount_gradio_app(app, gradio_app, path="/gradio")