docs: update config readme.

config/README.md

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+# OpenIM Chat Configuration Files and Common Configuration Item Modifications Guide
+
+## Configuration Files Explanation
+
+| Configuration File     | Description                                                                                                                                |
+| ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
+| **redis.yml**          | Configurations for Redis password, address, etc.                                                                                           |
+| **mongodb.yml**        | Configurations for MongoDB username, password, address, etc.                                                                               |
+| **share.yml**          | Common configurations needed by various OpenIM services, such as secret.                                                                   |
+| **discovery.yml**      | Service discovery account, password, service name and other configurations.                                                                |
+| **chat-api-chat.yml**  | Configurations for listening IP, port, etc., in chat-api-chat service.                                                                     |
+| **chat-api-admin.yml** | Configurations for listening IP, port, etc., in chat-api-admin service.                                                                    |
+| **chat-rpc-chat.yml**  | Configurations for listening IP, port, login registration verification code, registration allowance, and livekit in chat-rpc-chat service. |
+| **chat-rpc-admin.yml** | Configurations for listening IP, port, chat backend token expiration policy, and chat backend Secret in chat-rpc-admin service.            |
+
+## Common Configuration Item Modifications
+
+| Configuration Item to Modify              | Configuration File   |
+| ----------------------------------------- | -------------------- |
+| Modify OpenIM secret                      | `share.yml`          |
+| Production environment logs               | `log.yml`            |
+| Modify chat Admin username and password   | `share.yml`          |
+| Modify verification code                  | `chat-rpc-chat.yml`  |
+| Allow user registration                   | `chat-rpc-chat.yml`  |
+| Modify chat Admin token expiration policy | `chat-rpc-admin.yml` |
+| Modify chat Admin Secret                  | `chat-rpc-admin.yml` |
+
+## Starting Multiple Instances of an OpenIM Service
+
+To launch multiple instances of an OpenIM service, you just need to increase the corresponding number of ports and modify the `start-config.yml` file in the project's root directory, then restart the service for the changes to take effect. For example, the configuration for launching 2 instances of `chat-rpc` is as follows:
+
+```yaml
+rpc:
+  registerIP: ""
+  listenIP: 0.0.0.0
+  ports: [30300, 30301]
+```
+
+Modify `start-config.yml`:
+
+```yaml
+serviceBinaries:
+  chat-rpc: 2
+```

config/README_zh_CN.md

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+# OpenIM Chat 配置文件说明以及常用配置修改说明
+
+## 配置文件说明
+
+| Configuration File     | Description                                                                               |
+| ---------------------- | ----------------------------------------------------------------------------------------- |
+| **redis.yml**          | Redis 密码、地址等配置                                                                    |
+| **mongodb.yml**        | MongoDB 用户名、密码、地址等配置                                                          |
+| **log.yml**            | 日志级别及存储目录等配置                                                                  |
+| **share.yml**          | OpenIM 各服务所需的公共配置，如 secret、Admin 后台密码等                                  |
+| **discovery.yml**      | 服务发现对应的账号密码和服务名等配置                                                      |
+| **chat-api-chat.yml**  | chat-api-chat 服务的监听 IP、端口等配置                                                   |
+| **chat-api-admin.yml** | chat-api-admin 服务的监听 IP、端口等配置                                                  |
+| **chat-rpc-chat.yml**  | chat-rpc-chat.yml 服务的监听 IP、端口以及登录注册验证码、是否允许注册和 livekit 等配置    |
+| **chat-rpc-admin.yml** | chat-rpc-admin 服务的监听 IP、端口以及 chat 后台 token 过期策略和 chat 后台 Secret 等配置 |
+
+## 常用配置修改
+
+| 修改配置项                    | 配置文件             |
+| ----------------------------- | -------------------- |
+| 修改 OpenIM secret            | `share.yml`          |
+| 生产环境日志调整              | `log.yml`            |
+| 修改 chat Admin               | `share.yml`          |
+| 修改验证码相关配置            | `chat-rpc-chat.yml`  |
+| 允许用户注册                  | `chat-rpc-chat.yml`  |
+| 修改 chat 后台 token 过期策略 | `chat-rpc-admin.yml` |
+| 修改 chat 后台 Secret         | `chat-rpc-admin.yml` |
+
+## 启动某个 OpenIM 服务的多个实例
+
+若要启动某个 OpenIM 的多个实例，只需增加对应的端口数，并修改项目根目录下的`start-config.yml`文件，重启服务即可生效。例如，启动 2 个`chat-rpc`实例的配置如下：
+
+```yaml
+rpc:
+  registerIP: ""
+  listenIP: 0.0.0.0
+  ports: [30300, 30301]
+```
+
+Modify start-config.yml:
+
+```yaml
+serviceBinaries:
+  chat-rpc: 2
+```