docs: adjust readme

modules/otc-prometheus-exporter/README.md

@@ -1,4 +1,17 @@
-<!-- BEGIN_TF_DOCS -->
+## otc-prometheus-exporter
+
+This module deploys our [otc-prometheus-exporter](https://github.com/iits-consulting/otc-prometheus-exporter) with wich metrics on the open telekom cloud can be monitored
+
+Example:
+```
+module "otc_prometheus_exporter" {
+  source          = "registry.terraform.io/iits-consulting/project-factory/opentelekomcloud//modules/otc-prometheus-exporter"
+  name_prefix     = "${var.context}-${var.stage}"
+  domain_name     = var.otc_domain_name
+  release_version = local.chart_versions.otc_prometheus_exporter
+}
+```
+
 ## Requirements
 
 | Name | Version |