fixed 2223, change community tool from slack to discord. (oceanbase#2225)

Author: longdafeng

README.md

@@ -26,8 +26,8 @@
 </p>
 
 <p align="center">
-    <a href="https://join.slack.com/t/oceanbase/shared_invite/zt-1e25oz3ol-lJ6YNqPHaKwY_mhhioyEuw">
-        <img alt="Join Slack" src="https://img.shields.io/badge/slack-Join%20Oceanbase-brightgreen?logo=slack" />
+    <a href="https://discord.gg/74cF8vbNEs">
+        <img alt="Support" src="https://img.shields.io/badge/Disord-Join%20Oceanbase-brightgreen?logo=discord" />
     </a>
     <a href="https://stackoverflow.com/questions/tagged/oceanbase">
         <img alt="Stack Overflow" src="https://img.shields.io/badge/Stack-Stack%20Overflow-brightgreen?logo=stackoverflow" />
@@ -106,15 +106,13 @@ For future plans, see [Product Iteration Progress](https://github.com/oceanbase/
 
 # Case study
 
-OceanBase has been serving more than 1000 customers and upgraded their database from different industries, including Financial Services, Telecom, Retail, Internet, and more.
+OceanBase has been serving more than 2000 customers and upgraded their database from different industries, including Financial Services, Telecom, Retail, Internet, and more.
 
 See also [success stories](https://en.oceanbase.com/customer/home) and [Who is using OceanBase](https://github.com/oceanbase/oceanbase/issues/1301) for more details.
 
 # System architecture
 
-![System Architecture Diagram](https://obportal.s3.ap-southeast-1.amazonaws.com/doc/img/OceanBase-Database-EN/ob-cluster-arch.png)
-
-Please refer to [System architecture](https://en.oceanbase.com/docs/common-oceanbase-database-10000000001714483) for more information.
+[Introduction to system architecture](https://en.oceanbase.com/docs/community-observer-en-10000000000829641)
 
 # Contributing
 
@@ -128,8 +126,8 @@ OceanBase Database is licensed under the Mulan Public License, Version 2. See th
 
 Join the OceanBase community via:
 
-* [Slack Workspace](https://join.slack.com/t/oceanbase/shared_invite/zt-1e25oz3ol-lJ6YNqPHaKwY_mhhioyEuw)
+* [Discord](https://discord.gg/74cF8vbNEs)
 * [Ask on Stack Overflow](https://stackoverflow.com/questions/tagged/oceanbase)
 * [Chinese User Forum](https://ask.oceanbase.com/)
-* DingTalk Group: 33254054 ([QR code](images/dingtalk.svg))
+* DingTalk Group: [33254054](images/dingtalk.png)
 * WeChat Group (Add the assistant with WeChat ID: OBCE666)

README_CN.md

@@ -25,11 +25,11 @@
 </p>
 
 <p align="center">
-    <a href="https://join.slack.com/t/oceanbase/shared_invite/zt-1e25oz3ol-lJ6YNqPHaKwY_mhhioyEuw">
-        <img alt="Join Slack" src="https://img.shields.io/badge/slack-Join%20Oceanbase-brightgreen?logo=slack" />
+    <a href="https://ask.oceanbase.com">
+        <img alt="中文论坛" src="https://img.shields.io/badge/Support-Join%20OceanBase-brightgreen?logo=support" />
     </a>
-    <a href="https://stackoverflow.com/questions/tagged/oceanbase">
-        <img alt="Stack Overflow" src="https://img.shields.io/badge/Stack-Stack%20Overflow-brightgreen?logo=stackoverflow" />
+    <a href="images/dingtalk.png">
+        <img alt="DingTalk" src="https://img.shields.io/badge/Dingtalk-Dingtalk-brightgreen?logo=Dingtalk" />
     </a>
 </p>
 
@@ -107,15 +107,13 @@ obd demo
 
 # 案例
 
-OceanBase 已服务超过 1000 家来自不同行业的客户，包括金融服务、电信、零售、互联网等。
+OceanBase 已服务超过 2000 家来自不同行业的客户，包括金融服务、电信、零售、互联网等。
 
 更详细的信息请参考[客户案例](https://www.oceanbase.com/customer/home)和[谁在使用 OceanBase](https://github.com/oceanbase/oceanbase/issues/1301)。
 
 # 系统架构
 
-![系统架构图](https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/doc/img/observer-enterprise/V4.3.1/oceanbase-cluster-system-architecture.png)
-
-参考 [系统架构](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000001573483) 查看更详细的信息。
+[系统架构介绍](https://www.oceanbase.com/docs/common-oceanbase-database-cn-10000000001687855)
 
 # 社区贡献
 
@@ -130,7 +128,6 @@ OceanBase 数据库根据 Mulan 公共许可证版本 2 获得许可。有关详
 有以下加入社区的方法：
 
 * [中文论坛](https://ask.oceanbase.com/)
-* [Slack Workspace](https://join.slack.com/t/oceanbase/shared_invite/zt-1e25oz3ol-lJ6YNqPHaKwY_mhhioyEuw)
 * [Ask on Stack Overflow](https://stackoverflow.com/questions/tagged/oceanbase)
-* 钉钉群: 33254054 ([二维码](images/dingtalk.svg))
+* 钉钉群:  [33254054](images/dingtalk.png)
 * 微信群 (添加微信小助手: OBCE666)