docs: add Grafana dashboard template reference for signer

Author: jpraynaud

docs/website/blog/2024-03-26-mithril-signer-prometheus-endpoint/index.md

@@ -13,7 +13,8 @@ The endpoint is not activated by default, and needs to be setup by the SPOs who
 
 Please note that the Mithril signer needs to be restarted after the configuration for the Prometheus endpoint.
 
-Additionally, the team is also working on a Grafana template to easily setup a dashboard with this Prometheus endpoint:
+Additionally, a **Grafana template** has been created to easily setup a dashboard for this Prometheus endpoint (ID 20776): https://grafana.com/grafana/dashboards/20776-mithril-signer/
+
 [![Grafana Dashboard](img/grafana-dashboard.png)](img/grafana-dashboard.png)
 
 For any inquiries or assistance, don't hesitate to reach out to the team on the [Discord channel](https://discord.gg/5kaErDKDRq). 

docs/website/root/manual/getting-started/run-signer-node.md

@@ -450,6 +450,12 @@ When activated, the metrics endpoint will be accessible to the location `http://
 
 :::
 
+::: info
+
+Additionally, a **Grafana template** has been created to easily setup a dashboard for this Prometheus endpoint (ID 20776): https://grafana.com/grafana/dashboards/20776-mithril-signer/
+
+:::
+
 ### Rotating the KES keys
 
 :::danger

docs/website/versioned_docs/version-maintained/manual/getting-started/run-signer-node.md

@@ -450,6 +450,12 @@ When activated, the metrics endpoint will be accessible to the location `http://
 
 :::
 
+::: info
+
+Additionally, a **Grafana template** has been created to easily setup a dashboard for this Prometheus endpoint (ID 20776): https://grafana.com/grafana/dashboards/20776-mithril-signer/
+
+:::
+
 ### Rotating the KES keys
 
 :::danger