Add launcher

app.py

@@ -60,4 +60,6 @@ with gr.Blocks() as demo:
     qa_button = gr.Button(value="Submit question", interactive=False)
 
     lchain = pdf_object.change(create_langchain, inputs=pdf_object, outputs=[chain_state, qa_button])
-    qa_button.click(ask_question, inputs=[chain_state, question_box], outputs=gr.Textbox(label="Answer"))
+    qa_button.click(ask_question, inputs=[chain_state, question_box], outputs=gr.Textbox(label="Answer"))
+
+demo.launch(debug=True)