Add grafana picture (#1026)

Author: andytael

docs-source/transactional-event-queues/content/observability/exporter.md

@@ -15,20 +15,22 @@ To get started with the database exporter, see the [installation](https://github
 
 The database exporter supports [custom metric definitions](https://github.com/oracle/oracle-db-appdev-monitoring/tree/main?tab=readme-ov-file#custom-metrics) in the form of TOML files. The [TxEventQ custom metrics file](https://github.com/oracle/oracle-db-appdev-monitoring/blob/main/custom-metrics-example/txeventq-metrics.toml) contains metrics definitions for queue information like total number of queues, enqueued messages, dequeued messages, and more. You can include the TxEventQ metrics in the database exporter by using the `custom.metrics` program argument and passing the file location:
 
-```
+```text
 --custom.metrics=txeventq-metrics.toml
 ```
 
 Or, set the `CUSTOM_METRICS` environment variable to point to custom metric files:
 
-```
+```text
 CUSTOM_METRICS=txeventq-metrics.toml
 ```
 
 To add more TxEventQ metrics, you can create a custom metrics file based on the views described in the [TxEventQ Administrative Views](./views.md) section and then provide that file to the database exporter.
 
 ## Sample Grafana Dashboard
 
-The [Sample Dashboard for TxEventQ](https://github.com/oracle/oracle-db-appdev-monitoring/blob/main/docker-compose/grafana/dashboards/txeventq.json) visualizes database queueing metrics, and requires the custom metrics definitions located in the [TxEventQ custom metrics file](https://github.com/oracle/oracle-db-appdev-monitoring/blob/main/custom-metrics-example/txeventq-metrics.toml) to be loaded into the database exporter. 
+The [Sample Dashboard for TxEventQ](https://github.com/oracle/oracle-db-appdev-monitoring/blob/main/docker-compose/grafana/dashboards/txeventq.json) visualizes database queueing metrics, and requires the custom metrics definitions located in the [TxEventQ custom metrics file](https://github.com/oracle/oracle-db-appdev-monitoring/blob/main/custom-metrics-example/txeventq-metrics.toml) to be loaded into the database exporter.
 
 The dashboard can be loaded into a Grafana instance to visualize TxEventQ status, throughput, and subscriber information for a given queue.
+
+![Sample Dashboard for TxEventQ](../images/TxEventQGrafana.png " ")