Add "git clone" in the initial instructions

README.md

@@ -3,7 +3,11 @@ Fineliner [![Build Status](https://travis-ci.org/cassiosantos/fineliner.svg?bran
 
 Simple script to sort fineliners and shapes to draw.
 
-```
+To clone and run in a Docker container:
+
+```bash
+git clone git@github.com:cassiosantos/fineliner.git
+cd fineliner
 docker run -it -v $(pwd):/var/www swiftdocker/swift:latest bash
 cd /var/www
 swift test