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2nd chunk of `content/guides/go-prometheus-monitoring/develop.md`
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 => => exporting manifest list sha256:89ebc86fd51e27c1da440dc20858ff55fe42211a1930c2d51bbdce09f430c7f1                                                    0.0s
 => => naming to docker.io/library/go-api:latest                                                                                                          0.0s
 => => unpacking to docker.io/library/go-api:latest                                                                                                       0.0s
 => [api] resolving provenance for metadata file                                                                                                          0.0s
service(s) ["api"] successfully built
```

## Testing the application

Now that you have your application running, head over to the Grafana dashboard to visualize the metrics you are registering. Open your browser and navigate to `http://localhost:3000`. You will be greeted with the Grafana login page. The login credentials are the ones provided in Compose file. 

Once you are logged in, you can create a new dashboard. While creating dashboard you will notice that is default data source is `Prometheus`. This is because you have already configured the data source in the `grafana.yml` file.
Title: Testing the Application and Visualizing Metrics in Grafana
Summary
This section describes how to test the running application by visualizing metrics in Grafana. It guides the user to access the Grafana dashboard via `http://localhost:3000`, log in, and create a new dashboard. It highlights that Prometheus is the default data source due to pre-configuration in the `grafana.yml` file and includes a screenshot of the Grafana interface for selecting a data source.