Use join for configmap auth file and template file in auth.tf (#26)

* auth.tf: Use join for config map file

* auth.tf: Fix typo for local variable

* auth.tf: Format auth module

auth.tf

@@ -27,8 +27,8 @@ locals {
   certificate_authority_data_map           = local.certificate_authority_data_list_internal[0]
   certificate_authority_data               = local.certificate_authority_data_map["data"]
 
-  configmap_auth_template_file = "${path.module}/configmap-auth.yaml.tpl"
-  configmap_auth_file          = "${path.module}/configmap-auth.yaml"
+  configmap_auth_template_file = join("/", [path.module, "configmap-auth.yaml.tpl"])
+  configmap_auth_file          = join("/", [path.module, "configmap-auth.yaml"])
 
   cluster_name = join("", aws_eks_cluster.default.*.id)