update install URL in mainland

docs/en_US/index.md

@@ -10,6 +10,9 @@ hero:
   image: https://raw.githubusercontent.com/naiba/nezha/master/resource/static/brand.svg
   actions:
     - theme: brand
+      text: Preview
+      link: https://ops.naibahq.com  
+    - theme: alt
       text: Learn More → 
       link: /en_US/guide/dashboard
 

docs/guide/agent.md

@@ -42,7 +42,7 @@ curl -L https://raw.githubusercontent.com/naiba/nezha/master/script/install.sh
 ```
 如果你的被控服务器位于中国大陆，可以使用镜像：  
 ````bash
-curl -L https://cdn.jsdelivr.net/gh/naiba/nezha@master/script/install.sh -o nezha.sh && chmod +x nezha.sh && sudo CN=true ./nezha.sh
+curl -L https://jihulab.com/nezha/dashboard/-/raw/master/script/install.sh -o nezha.sh && chmod +x nezha.sh && sudo CN=true ./nezha.sh
 ````
 * 选择“安装监控 Agent”  
 * 输入通信域名，如：”data.example.com“  

docs/guide/dashboard.md

@@ -48,7 +48,7 @@ curl -L https://raw.githubusercontent.com/naiba/nezha/master/script/install.sh
 ```  
 如果你的面板服务器位于中国大陆，可以使用镜像：  
 ````bash
-curl -L https://cdn.jsdelivr.net/gh/naiba/nezha@master/script/install.sh -o nezha.sh && chmod +x nezha.sh && sudo CN=true ./nezha.sh
+curl -L https://jihulab.com/nezha/dashboard/-/raw/master/script/install.sh -o nezha.sh && chmod +x nezha.sh && sudo CN=true ./nezha.sh
 ````
 
 * 等待Docker安装完毕后，分别输入以下值：  

docs/index.md

@@ -10,7 +10,10 @@ hero:
   image: https://raw.githubusercontent.com/naiba/nezha/master/resource/static/brand.svg
   actions:
     - theme: brand
-      text: 开始使用 →  
+      text: 预览
+      link: https://ops.naibahq.com  
+    - theme: alt
+      text: 开始使用 →
       link: /guide/dashboard  
 
 features: