Added terraform-docs integration (#13)

* Add hook to create readme

* Updated README

.pre-commit-hooks.yaml

@@ -6,6 +6,14 @@
   files: (\.tf|\.tfvars)$
   exclude: \.terraform\/.*$
 
+- id: terraform_docs
+  name: Terraform Docs
+  description: Inserts input and output documentation into README.md (using terraform-docs).
+  entry: terraform_docs.sh
+  language: script
+  files: (\.tf)$
+  exclude: \.terraform\/.*$
+
 - id: terraform_validate_no_variables
   name: Terraform validate without variables
   description: Validates all Terraform configuration files without checking whether all required variables were set (basic check).