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docs/modules/app-manager/README.md

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+## QuickStart
+KubeSphere uses same app-manager module from [OpenPitrix](https://github/openpitrix/openpitrix), which is another open source project initiated by QingCloud. 
+For testing and development purpose, follow steps below to setup app-manager service locally:
+* Make sure git and docker runtime is installed in your local environment  
+* Clone the OpenPitrix project to your local environment: 
+  ```console
+  git clone https://github.com/openpitrix/openpitrix.git
+  ```  
+* Get into openpitrix directory, run commands below:  
+  ```console
+  cd openpitrix
+  make build
+  make compose-up-app
+  ```  
+
+## Test app-manager
+
+Visit http://127.0.0.1:9100/swagger-ui in browser, and try it online, or test app-manager api service via command line:
+
+```shell
+$ curl http://localhost:9100/v1/apps
+{"total_items":0,"total_pages":0,"page_size":10,"current_page":1}