docs: how to custom service uri when use database-discovery (#4743)

* docs: custom service uri when use database-discovery

* Update docs/en/deployment/distributed-deployment-guide.md

Co-authored-by: Jason Song <nobodyiam@gmail.com>

* Update docs/en/deployment/distributed-deployment-guide.md

Co-authored-by: Jason Song <nobodyiam@gmail.com>

* Update docs/zh/deployment/distributed-deployment-guide.md

Co-authored-by: Jason Song <nobodyiam@gmail.com>

---------

Co-authored-by: Jason Song <nobodyiam@gmail.com>

docs/en/deployment/distributed-deployment-guide.md

@@ -752,12 +752,20 @@ Apollo supports the use of internal database table as registry, without relying
     spring.profiles.active=github,database-discovery
     ```
 
-2. In multi-cluster deployments, if you want apollo client only read Config Service in the same cluster,
+2. (optional) In multi-cluster deployments, if you want apollo client only read Config Service in the same cluster,
 you can add a property in `config/application-github.properties` of the Config Service and Admin Service installation package
 ```properties
 apollo.service.registry.cluster=same name with apollo Cluster
 ```
 
+2. (optional) If you want to customize Config Service and Admin Service's uri for Client, 
+for example when deploying on the intranet, 
+if you don't want to expose the intranet ip, 
+you can add a property in `config/application-github.properties` of the Config Service and Admin Service installation package
+    ```properties
+    apollo.service.registry.uri=http://your-ip-or-domain:${server.port}/
+    ```
+
 ## 2.3 Docker Deployment
 
 ### 2.3.1 Version 1.7.0 and above

docs/zh/deployment/distributed-deployment-guide.md

@@ -670,7 +670,7 @@ apollo.config-service.url=http://apollo-config-service
 apollo.admin-service.url=http://apollo-admin-service
 ```
 
-##### 2.2.3.5.2 2.1.0 之前的版本
+##### 2.2.3.4.2 2.1.0 之前的版本
 
 > 注意：需要重新打包
 
@@ -709,13 +709,20 @@ Apollo支持使用内部的数据库表作为注册中心，不依赖第三方
     spring.profiles.active=github,database-discovery
     ```
 
-2. 在多机房部署时，
+2. （可选）在多机房部署时，
    如果你需要apollo客户端只读取同机房内的Config Service，
    你可以在Config Service和Admin Service安装包中`config/application-github.properties`新增一条配置
     ```properties
     apollo.service.registry.cluster=与apollo的Cluster同名
     ```
 
+3. （可选）如果你希望自定义Config Service和Admin Service给Client使用的uri，
+    例如在内网部署时，
+    如果不希望暴露内网ip，
+    你可以在Config Service和Admin Service安装包中`config/application-github.properties`新增一条配置
+    ```properties
+    apollo.service.registry.uri=http://你的ip或者域名:${server.port}/
+    ```
 
 ## 2.3 Docker部署
 ### 2.3.1 1.7.0及以上版本