quick install guide

README.md

@@ -7,5 +7,6 @@ Postal is a complete and fully featured mail server for use by websites & web se
 The application has been running in production for us for nearly 6 months and we will be continuing to use it ourselves and support its ongoing development. If you have any questions about getting up and running, just post an issue.
 
 * [Read all documentation](https://github.com/atech/postal/wiki)
+* [Quick install guide](https://github.com/atech/postal/wiki/Quick-Install))
 * [Installation docs](https://github.com/atech/postal/wiki/Installation)
 * [FAQs](https://github.com/atech/postal/wiki/FAQs), [Features](https://github.com/atech/postal/wiki/Features) & [Screenshots](https://github.com/atech/postal/wiki/Screenshots)