Adding Readme cuz hastlayer

Readme.md

@@ -14,6 +14,7 @@ We at [Lombiq](https://lombiq.com/) also used this library for the following pro
 - The new [Ik wil een taart website](https://ikwileentaart.nl/) ([see case study](https://dotnest.com/blog/revamping-ik-wil-een-taart-migrating-an-old-version-of-orchard-core-website-with-custom-theme-and-commerce-logic-to-dotnest)).<!-- #spell-check-ignore-line -->
 - The new client portal for [WTW](https://www.wtwco.com/) ([see case study](https://lombiq.com/blog/lombiq-s-journey-with-wtw-s-client-portal)).
 - The new [Git-hg Mirror website](https://githgmirror.com/) when migrating it from Orchard 1 to Orchard Core ([see case study](https://lombiq.com/blog/git-hg-mirror-is-running-on-orchard-core)).<!-- #spell-check-ignore-line -->
+- The new [Hastlayer website](https://hastlayer.com/) when migrating it from Orchard 1 to Orchard Core ([see case study](https://lombiq.com/blog/modernization-and-migration-of-hastlayer-com)).<!-- #spell-check-ignore-line -->
 
 Do you want to quickly try out this project and see it in action? Check it out in our [Open-Source Orchard Core Extensions](https://github.com/Lombiq/Open-Source-Orchard-Core-Extensions) full Orchard Core solution and also see our other useful Orchard Core-related open-source projects!