Added link to engineering guidelines

Author: Eilon

CONTRIBUTING.md

@@ -53,6 +53,10 @@ Before submitting a feature or substantial code contribution please discuss it w
 
 Here's a few things you should always do when making changes to the code base:
 
+**Engineering guidelines*
+
+The coding, style, and general engineering guidelines are published on the [Engineering guidelines](https://github.com/aspnet/Home/wiki/Engineering-guidelines) page.
+
 **Commit/Pull Request Format**
 
 ```