Add Docker image badge

README.md

@@ -10,6 +10,7 @@
 <a target="_blank" href="https://travis-ci.com/TheYahya/sherlock/" title="Build Status"><img src="https://travis-ci.com/TheYahya/sherlock.svg?branch=master"></a>
 <a target="_blank" href="https://twitter.com/intent/tweet?text=%F0%9F%94%8E%20Find%20usernames%20across%20social%20networks%20&url=https://github.com/TheYahya/sherlock&hashtags=hacking,%20osint,%20bugbounty,%20reconnaissance" title="Share on Tweeter"><img src="https://img.shields.io/twitter/url/http/shields.io.svg?style=social"></a>
 <a target="_blank" href="http://sherlock-project.github.io/"><img alt="Website" src="https://img.shields.io/website-up-down-green-red/http/sherlock-project.github.io/..svg"></a>
+<a target="_blank" href="https://microbadger.com/images/theyahya/sherlock"><img alt="docker image" src="https://images.microbadger.com/badges/version/theyahya/sherlock.svg"></a>
 </p>
 <p align="center">
 <a href="https://asciinema.org/a/223115">