Add dashboards output (#46)

modules/workloads/nginx/README.md

@@ -60,5 +60,7 @@ It provides the following resources:
 
 ## Outputs
 
-No outputs.
+| Name | Description |
+|------|-------------|
+| <a name="output_grafana_dashboard_urls"></a> [grafana\_dashboard\_urls](#output\_grafana\_dashboard\_urls) | URLs for dashboards created |
 <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->

modules/workloads/nginx/outputs.tf

@@ -0,0 +1,4 @@
+output "grafana_dashboard_urls" {
+  value       = [concat(grafana_dashboard.workloads.*.url)]
+  description = "URLs for dashboards created"
+}