optimize(web): program cleanup on exit

infer-web.py

@@ -1639,6 +1639,14 @@ with gr.Blocks(title="RVC WebUI") as app:
                 gr.Markdown(traceback.format_exc())
 
 try:
+    import signal
+    def cleanup(signum, frame):
+        signame = signal.Signals(signum).name
+        print(f'Got signal {signame} ({signum})')
+        app.close()
+        sys.exit(0)
+    signal.signal(signal.SIGINT, cleanup)
+    signal.signal(signal.SIGTERM, cleanup)
     if config.iscolab:
         app.queue(max_size=1022).launch(share=True, max_threads=511)
     else: