[NDR-73] reverting

Author: SWhyteAnswer

infrastructure/gateway-document-reference.tf

@@ -2,7 +2,7 @@ module "document_reference_gateway" {
   source              = "./modules/gateway"
   api_gateway_id      = aws_api_gateway_rest_api.ndr_doc_store_api.id
   parent_id           = aws_api_gateway_rest_api.ndr_doc_store_api.root_resource_id
-  http_methods        = ["POST"]
+  http_methods        = ["POST", "GET"]
   authorization       = "NONE"
   api_key_required    = true
   gateway_path        = "DocumentReference"