Add stars chart

Author: luckylittle

README.md

@@ -6,6 +6,10 @@ This is the only Docker document that you will ever need!
 $ wget --no-check-certificate https://raw.githubusercontent.com/luckylittle/docker-cheatsheet/master/docker-cheatsheet.txt
 ```
 
+## Stargazers over time
+
+[![Stargazers over time](https://starchart.cc/luckylittle/docker-cheatsheet.svg)](https://starchart.cc/luckylittle/docker-cheatsheet)
+
 ### Contributors
 Lucian Maly <<[email protected]>> ~~<<[email protected]>>~~