docs: add links to official Grafana documentation for creating and mo…

…difying dashboards (keptn#2539)

Co-authored-by: Moritz Wiesinger <moritz.wiesinger@dynatrace.com>

.markdownlint-cli2.yaml

@@ -18,3 +18,4 @@ ignores:
   - "**/CHANGELOG.md"
   - "node_modules"
   - "docs/tmp"
+  - "readme-generator-for-helm"

dashboards/grafana/README.md

@@ -34,3 +34,23 @@ If you prefer to prepare the dashboards for the examples and importing them as j
 ```shell
 make import-json
 ```
+
+---
+
+## Guide to Custom Dashboards with Grafana
+
+This section provides links to the official Grafana documentation for creating and modifying custom dashboards using Grafana.
+
+## How to Create Custom Dashboards
+
+Craft personalized Grafana dashboards tailored to your specific needs by exploring the [official Grafana documentation](https://grafana.com/docs/grafana/latest/dashboards/build-dashboards/create-dashboard/).
+Discover detailed steps, best practices, and tips for creating visualizations, adding panels,
+utilizing various data sources, and more.
+
+## Modifying the Dashboards
+
+Refine and adapt visualizations in existing Grafana dashboards to meet evolving requirements.
+Visit the
+[relevant sections](https://grafana.com/docs/grafana/latest/dashboards/build-dashboards/modify-dashboard-settings/)
+of the Grafana documentation to gain insights on adjusting, enhancing, or reconfiguring dashboards efficiently.
+Learn about editing panels, incorporating new data sources, applying filters, and optimizing dashboard layouts.