Adding Docker version recommendation laradock#895

Author: winfried-van-loon

DOCUMENTATION/content/getting-started/index.md

@@ -145,6 +145,10 @@ If you are using **Docker Toolbox** (VM), do one of the following:
 
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+We recommend using a Docker version which is newer than 1.13. 
+
+<br>
+
 >**Warning:** If you used an older version of Laradock it's highly recommended to rebuild the containers you need to use [see how you rebuild a container](#Build-Re-build-Containers) in order to prevent as much errors as possible.
 
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