added placeholder to document content

app.py

@@ -218,7 +218,7 @@ with gr.Blocks(fill_height=True) as demo:
             
             text_input = gr.Textbox(
                 label="Document Content",
-                placeholder="Enter your document text here...",
+                placeholder=f"Enter your document text here. Default doc is -- {DEFAULT_DOC}",
                 lines=10,
                 info="Enter the text you want to reference. If empty, default document will be used."
             )