Link Hexagonal Architecture pattern to corresponding blog entry

iluwatar · iluwatar · commit e1ae1067dbf8 · 2016-11-06T12:26:03.000+02:00
diff --git a/hexagonal/README.md b/hexagonal/README.md
@@ -26,6 +26,9 @@ Use Hexagonal Architecture pattern when
 * it is important that the application is fully testable
 * you use Domain Driven Design methodology and/or Microservices architectural style
 
+## Tutorials
+* [Build Maintainable Systems With Hexagonal Architecture](http://java-design-patterns.com/blog/build-maintainable-systems-with-hexagonal-architecture/)
+
 ## Real world examples
 
 * [Apache Isis](https://isis.apache.org/)
