Added Terraform deployment option

Author: fwang

README.md

@@ -80,6 +80,7 @@ The OpenNext community has contributed deployment options for a few other framew
 - CDK: https://github.com/jetbridge/cdk-nextjs
 - CloudFormation: https://github.com/serverless-stack/open-next/issues/32
 - Serverless Framework: https://github.com/serverless-stack/open-next/issues/32
+- Terraform: https://github.com/RJPearson94/terraform-aws-open-next
 
 To use these, you'll need to run the following inside your Next.js app.