fix my stupidity

app.py

@@ -162,6 +162,6 @@ description = "A Job-Shop Scheduling Reinforcement Learning based solver, using
 
 article = "<p style='text-align: center'>Article Under Review</p>"
 # list all non-hidden files in the 'instances' directory
-examples = [f for f in os.listdir('instances') if not f.startswith('.')]
+examples = ['instances/' + f for f in os.listdir('instances') if not f.startswith('.')]
 iface = gr.Interface(fn=solve, inputs=gr.File(label="Instance File"), outputs=[gr.Text(label="Solution"), gr.Image(label="Solution's Gantt Chart"), gr.Text(label="Elapsed Time")], title=title, description=description, article=article, examples=examples)
 iface.launch(enable_queue=True)