update os and credits docs

Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>

CREDITS.md

@@ -8,6 +8,12 @@ CREDITS
 
 ----------------------------
 
+```
+N: Alibaba Dragonwell developer team
+W: https://github.com/alibaba/dragonwell8
+D: Alibaba Dragonwell JDK
+```
+
 ```
 N: Aliyun CLI developer team
 W: https://github.com/aliyun/aliyun-cli

os.md

@@ -21,7 +21,7 @@ Table of Contents
 
 Alibaba Cloud Linux (a.k.a. Aliyun Linux) OS is an open-source Linux distribution originated by Alibaba Operating System team, aiming to deliver OS services with various functionality, high performance and stability to Alibaba Cloud Elastic Compute Service (ECS) customers.
 
-Current released version is Alibaba Cloud Linux OS version 2, or known as 'Aliyun Linux 2'.
+Current released version is Alibaba Cloud Linux OS version 2, or known as 'Aliyun Linux 2', please refer to the [release note](https://www.alibabacloud.com/help/doc-detail/111881.html) for more details.
 
 ## 2. How to use
 

zh/CREDITS.md

@@ -5,6 +5,12 @@
 
 ----------------------------
 
+```
+N: Alibaba Dragonwell (“龙井”)
+W: https://github.com/alibaba/dragonwell8
+D: Alibaba Dragonwell JDK
+```
+
 ```
 N: Aliyun CLI 开发团队
 W: https://github.com/aliyun/aliyun-cli

zh/os.md

@@ -23,6 +23,8 @@ Alibaba Cloud Linux 操作系统(原名 _Aliyun Linux_)是一款开源且免费
 
 Alibaba Cloud Linux 2 是 Alibaba Cloud Linux 的下一代版本，其开发团队是阿里巴巴操作系统团队，前身是淘宝内核组。九年来，团队成员大多是活跃在内核社区的开发者，积累了深厚的操作系统和内核开发底蕴。
 
+可以访问 Alibaba Cloud Linux 2 的[产品文档](https://help.aliyun.com/document_detail/111881.html)以获取产品更多信息。
+
 ## 2. 如何使用 Alibaba Cloud Linux 2
 
 当前我们随阿里云 ECS 实例免费提供 Alibaba Cloud Linux 2 操作系统镜像。如需使用，可以通过以下链接购买 ECS 实例：[中文站](https://ecs-buy.aliyun.com/), [eng](https://ecs-buy-intl.aliyun.com/).