doc about config samples

docs/manual/index.adoc

@@ -4,6 +4,9 @@
 <<<
 include::src/introduction.adoc[]
 
+<<<
+include::src/config_samples.adoc[]
+
 <<<
 include::src/pricing_rules.adoc[]
 

docs/manual/src/config_samples.adoc

@@ -0,0 +1,13 @@
+=== Config samples
+
+If you want to quickly get started, you can create pricing rules and context data using the link:https://github.com/spoud/kafka-cost-control/tree/master/config[config sample folder]. All you need is node JS 20+.
+
+Be sure to edit the files `pricing-rules.json` and `context-data.json` to match your environment.
+
+To persist the configuration you can use the following command:
+
+```bash
+node index.js --url=https://<your-host>/graphql --user=admin --password=your-password
+```
+
+If you have issues you can try to add the `--verbose` options. This will display all the requests.