Update README.md (microsoft#302)

README.md

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 [![Build Status](https://dev.azure.com/DeepSpeedMSFT/DeepSpeed/_apis/build/status/microsoft.DeepSpeed?branchName=master)](https://dev.azure.com/DeepSpeedMSFT/DeepSpeed/_build/latest?definitionId=1&branchName=master)
 [![Documentation Status](https://readthedocs.org/projects/deepspeed/badge/?version=latest)](https://deepspeed.readthedocs.io/en/latest/?badge=latest)
 [![License MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/Microsoft/DeepSpeed/blob/master/LICENSE)
+[![Docker Pulls](https://img.shields.io/docker/pulls/deepspeed/deepspeed)](https://hub.docker.com/r/deepspeed/deepspeed)
+
 
 [DeepSpeed](https://www.deepspeed.ai/) is a deep learning optimization
 library that makes distributed training easy, efficient, and effective.