Update README.md

add link to terraform repo

Author: benpiper

route53/README.md

@@ -1,3 +1,7 @@
 ## Lab setup
 
-[lab-setup.ps1](lab-setup.ps1) - View [lab-setup.md](lab-setup.md) for instructions
+[lab-setup.ps1](lab-setup.ps1) - View [lab-setup.md](lab-setup.md) for instructions
+
+### Terraform (Optional)
+
+Emmanuel Ojeah has created Terraform templates for the course. You can find them at https://github.com/EOjeah/route53-ps