Update the DNS instructions for NanoKVM

docs/hardware/en/kvm/NanoKVM/faq.md

@@ -9,7 +9,7 @@ keywords: NanoKVM, Remote desktop, Lichee, PiKVM, RISCV, tool
 
 1. Refer to [this link](https://wiki.sipeed.com/hardware/zh/kvm/NanoKVM/system/updating.html#%E8%8E%B7%E5%8F%96-IP) to connect the development board.
 2. Execute: `python /etc/kvm/update-nanokvm.py`
-   > Users outside of China may experience download failures due to DNS issues. Please add `nameserver 119.29.29.29` or `nameserver 223.5.5.5` to `/etc/resolv.conf` and try again.
+   > Users outside of China may experience download failures due to DNS issues. Please refer to [Detailed DNS Configuration Guide for NanoKVM Cube/Lite/PCIe](https://wiki.sipeed.com/hardware/en/kvm/NanoKVM/user_guide.html#Setting-DNS) to add recommended DNS servers and try again.
    > Earlier versions of the application may not have this script file. Please download [here](https://github.com/sipeed/NanoKVM/blob/main/kvmapp/system/update-nanokvm.py), extract it, and grant execute permissions before trying again.
 
 ### About Password

docs/hardware/en/kvm/NanoKVM/user_guide.md

@@ -140,6 +140,18 @@ Note:
 ### Setting DNS
 
 + If you need to set a DNS list, create `/boot/resolv.conf`. This will enforce your own DNS configuration after booting.
++ NanoKVM will automatically read the DNS configuration from `/boot/resolv.conf` during startup. If `/boot/resolv.conf` does not exist or is empty, the default DNS configuration will be used.
++ Recommended DNS servers:
+```
+nameserver 119.29.29.29     # Tencent Cloud DNS
+nameserver 182.254.116.116  # Tencent Cloud DNS
+nameserver 223.5.5.5        # Aliyun DNS
+nameserver 223.6.6.6        # Aliyun DNS
+nameserver 8.8.8.8          # Google DNS
+nameserver 8.8.4.4          # Google DNS
+nameserver 1.1.1.1          # Cloudflare DNS
+nameserver 1.0.0.1          # Cloudflare DNS
+```
 
 ### About mDNS
 

docs/hardware/zh/kvm/NanoKVM/faq.md

@@ -8,7 +8,7 @@ keywords: NanoKVM, Remote desktop, Lichee, PiKVM, RISCV, tool
 **以下解决方法都基于最新的应用，如果遇到问题，请先更新应用，若无法在网页端更新，请参照以下步骤完成强制更新：**
   1. 参考[这里](https://wiki.sipeed.com/hardware/zh/kvm/NanoKVM/system/updating.html#%E8%8E%B7%E5%8F%96-IP)连接开发板
   2. 执行：`python /etc/kvm/update-nanokvm.py`
-  > 国外用户可能因为DNS原因下载失败，请在 `/etc/resolv.conf` 添加`nameserver 119.29.29.29`或`nameserver 223.5.5.5`后再试
+  > 国外用户可能因为DNS原因下载失败，请参考[NanoKVM Cube/Lite/PCIe操作DNS的详细说明](https://wiki.sipeed.com/hardware/zh/kvm/NanoKVM/user_guide.html#设置DNS)添加推荐的DNS后再试
   > 早期版本应用可能不存在该脚本文件，请下载 https://github.com/sipeed/NanoKVM/blob/main/kvmapp/system/update-nanokvm.py 解压赋予执行权限后再试
 
 ### 关于密码

docs/hardware/zh/kvm/NanoKVM/user_guide.md

@@ -136,6 +136,18 @@ NanoKVM 的 USB 会默认虚拟出 RNDIS USB网卡（从设备），当 NanoKVM
 ### 设置DNS
 
 + 如果需要设置DNS列表，请在创建/boot/resolv.conf，这将在启动后强制使用你自己的DNS配置
++ NanoKVM会在开机时自动从 `/boot/resolv.conf` 读取DNS配置，若 `/boot/resolv.conf` 不存在或为空，则会使用默认的DNS配置
++ 推荐的DNS：
+```
+nameserver 119.29.29.29     # 腾讯云DNS
+nameserver 182.254.116.116  # 腾讯云DNS
+nameserver 223.5.5.5        # 阿里云DNS
+nameserver 223.6.6.6        # 阿里云DNS
+nameserver 8.8.8.8          # Google DNS
+nameserver 8.8.4.4          # Google DNS
+nameserver 1.1.1.1          # Cloudflare DNS
+nameserver 1.0.0.1          # Cloudflare DNS
+```
 
 ### 关于mDNS