docs: update install step docs

Signed-off-by: yutao04 <yutao04@corp.netease.com>

install/README.md

@@ -4,11 +4,13 @@
 
 We use helm to install gateway on kubernetes. If you do not have a kubernetes, you can start with [minikube start](https://minikube.sigs.k8s.io/docs/start/)
 
-Kubernetes Version >=1.17
+1.22 > Kubernetes Version >=1.17
 
 ### Install with Shell
 
-1. Go to the "hango-gateway/install" directory. The directory structure tree is as follows
+1. Go to github hango-gateway's [releases page](https://github.com/hango-io/hango-gateway/releases) to download the latest version: [release-v1.0.0](https://github.com/hango-io/hango-gateway/releases/download/v1.0.0/hango-gateway-v1.0.0.zip), then decompress the zip file to a local directory
+
+2. Go to the "hango-gateway/install" directory. The directory structure tree is as follows
 ```xml
 install
 install
@@ -20,13 +22,13 @@ install
 ├─check.sh
 └─uninstall.sh
 ```
-2. You will see three scripts for install (install.sh), check status (check.sh), and uninstall (uninstall.sh) respectively. You can directly execute the command
+3. You will see three scripts for install (install.sh), check status (check.sh), and uninstall (uninstall.sh) respectively. You can directly execute the command
 
 Note: Make sure you have sufficient permissions before executing the script
 ```shell
 sh install.sh
 ```
-3. After the script is executed, run the following command to verify the running status of the Hango gateway
+4. After the script is executed, run the following command to verify the running status of the Hango gateway
 ```shell
 sh check.sh
 ```

install/README.zh_CN.md

@@ -2,12 +2,14 @@
 
 ## 前置条件
 
-1.目前版本支持基于Kubernetes进行安装，如果没有Kubernetes环境，可以采用[minikube](https://minikube.sigs.k8s.io/docs/start/) 进行安装。对于Kubernetes的版本，我们要求版本至少是1.17 版本。\
+1.目前版本支持基于Kubernetes进行安装，如果没有Kubernetes环境，可以采用[minikube](https://minikube.sigs.k8s.io/docs/start/) 进行安装。对于Kubernetes的版本，我们要求版本至少是1.17 版本，低于1.22 版本。\
 2.请确保已安装helm。
 
 ### 安装hango网关
 
-1、进入"hango-gateway/install"目录下，目录结构树如下
+1、前往github hango-gateway的[releases界面](https://github.com/hango-io/hango-gateway/releases)下载最新的[release-v1.0.0版本](https://github.com/hango-io/hango-gateway/releases/download/v1.0.0/hango-gateway-v1.0.0.zip)，将压缩包解压为本地目录
+
+2、进入"hango-gateway/install"目录下，目录结构树如下
 ```xml
 install
 ├─common
@@ -18,12 +20,12 @@ install
 ├─check.sh
 └─uninstall.sh
 ```
-2、您将看到3个脚本分别用于安装（install.sh）、检查状态（check.sh）、卸载（uninstall.sh），可直接执行命令\
+3、您将看到3个脚本分别用于安装（install.sh）、检查状态（check.sh）、卸载（uninstall.sh），可直接执行命令\
 注意：在脚本执行前请确保权限足够
 ```shell
 sh install.sh
 ```
-3、等待脚本执行完毕后，可以通过执行下面的命令查看hango网关的运行状态
+4、等待脚本执行完毕后，可以通过执行下面的命令查看hango网关的运行状态
 ```shell
 sh check.sh
 ```