Update Briscola_app.py

Briscola_app.py

@@ -269,4 +269,4 @@ def serve_static(filename):
     return send_from_directory(os.path.join(dataset_dir, 'static'), filename)
 
 
-app.run(debug=False, use_reloader=False, host="0.0.0.0", port=7860)
+app.run(debug=False, use_reloader=False, host="0.0.0.0", port=int(os.environ.get("PORT", "7860")))