Add help message

app.py

@@ -122,6 +122,10 @@ with gr.Blocks() as demo:
                 concurrency_limit=20,
             )
 
+            help_msg = gr.Markdown(
+                value="Once the document is loaded, press the Encode button below to add it to the db."
+            )
+
             file_btn = gr.Button(value="Encode file ✅", interactive=True)
             btn_msg = gr.Textbox(container=False, visible=False)