Update docs

README-zh.md

@@ -8,6 +8,16 @@
 
 该脚本可让你在几分钟内建立自己的 VPN 服务器，即使你以前没有使用过 OpenVPN。[OpenVPN](https://openvpn.net/community-resources/reference-manual-for-openvpn-2-4/) 是一种开源、强大且高度灵活的 VPN 协议。
 
+<details>
+<summary>
+查看脚本的示例输出（终端记录）。
+</summary>
+
+**注：** 此终端记录仅用于演示目的。该记录中的 VPN 凭据 **无效**。
+
+<p align="center"><img src="docs/images/demo1.svg"></p>
+</details>
+
 [**&raquo; 另见：WireGuard VPN 服务器一键安装脚本**](https://github.com/hwdsl2/wireguard-install/blob/master/README-zh.md)
 
 ## 安装说明

README.md

@@ -8,6 +8,16 @@ OpenVPN server installer for Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS, Fed
 
 This script will let you set up your own VPN server in just a few minutes, even if you haven't used OpenVPN before. [OpenVPN](https://openvpn.net/community-resources/reference-manual-for-openvpn-2-4/) is an open-source, robust and highly flexible VPN protocol.
 
+<details>
+<summary>
+See the script in action (terminal recording).
+</summary>
+
+**Note:** This recording is for demo purposes only. VPN credentials in this recording are **NOT** valid.
+
+<p align="center"><img src="docs/images/demo1.svg"></p>
+</details>
+
 [**&raquo; See also: WireGuard VPN Server Auto Setup Script**](https://github.com/hwdsl2/wireguard-install)
 
 ## Installation