diff --git a/Dockerfile b/Dockerfile
index d2ba1a2..86d5db3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -61,8 +61,8 @@ RUN rm -rf /app/components && ln -sf /app/templates/components /app/components
 ENV PYTHONUNBUFFERED=1
 ENV FLASK_APP=app.py
 
-# 暴露端口
-EXPOSE 5000
+# 暴露端口（容器內 app 綁 80，docker-compose / k8s 對外映射依環境而定）
+EXPOSE 80
 
-# 啟動應用
-CMD ["python", "app.py"]
+# 啟動應用（production 用 gunicorn，4 workers + 300s timeout + 啟用 access/error log）
+CMD ["gunicorn", "--bind", "0.0.0.0:80", "--workers", "4", "--timeout", "300", "--access-logfile", "-", "--error-logfile", "-", "app:app"]