Update README.md

Add archive notice

README.md

@@ -1,3 +1,12 @@
+<!-- archived-provider -->
+Please note: This Terraform provider is archived, per our [provider archiving process](https://terraform.io/docs/internals/archiving.html). What does this mean?
+1. The code repository and all commit history will still be available.
+1. Existing released binaries will remain available on the releases site.
+1. Issues and pull requests are not being monitored.
+1. New releases will not be published.
+
+If anyone from the community or an interested third party is willing to maintain it, they can fork the repository and [publish it](https://www.terraform.io/docs/registry/providers/publishing.html) to the Terraform Registry. If you are interested in maintaining this provider, please reach out to the [Terraform Provider Development Program](https://www.terraform.io/guides/terraform-provider-development-program.html) at *[email protected]*.
+
 Terraform Provider
 ==================