Update README.md

README.md

-<img src='https://paddle-serving.bj.bcebos.com/imdb-demo%2FLogoMakr-3Bd2NM-300dpi.png' width = "800" height = "170">
+<img src='https://paddle-serving.bj.bcebos.com/imdb-demo%2FLogoMakr-3Bd2NM-300dpi.png' width = "600" height = "127">
 
 An easy-to-use Machine Learning Model Inference Service Deployment Tool
 
 [![Release](https://img.shields.io/badge/Release-0.0.3-yellowgreen)](Release)
 [![Issues](https://img.shields.io/github/issues/PaddlePaddle/Serving)](Issues)
 [![License](https://img.shields.io/github/license/PaddlePaddle/Serving)](LICENSE)
-[![Slack](https://img.shields.io/badge/Join-Slack-green)](https://paddleserving.slack.com/archives/CU0PB4K35)
 
 [中文](./doc/README_CN.md)
 
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 ```
 
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 ### Document
 
 [Design Doc(Chinese)](doc/DESIGN.md)
@@ -65,9 +66,6 @@ print(fetch_map)
 
 [Compile from source code(Chinese)](doc/COMPILE.md)
 
-## Join Community
-To connect with other users and contributors, welcome to join our [Slack channel](https://paddleserving.slack.com/archives/CUBPKHKMJ)
-
 ## Contribution
 
 If you want to contribute code to Paddle Serving, please reference [Contribution Guidelines](doc/CONTRIBUTE.md)