Update Prometheus set up steps

doc/user/project/integrations/prometheus.md

@@ -38,6 +38,23 @@ Once you have a connected Kubernetes cluster with Helm installed, deploying a ma
 
 ![Managed Prometheus Deploy](img/prometheus_deploy.png)
 
+#### Getting metrics to display on the Metrics Dashboard
+
+After completing the steps above, you will also need deployments in order to view the
+**Operations > Metrics** page. Setting up [Auto DevOps](../../../topics/autodevops/index.md)
+will help you to quickly create a deployment:
+
+1. Navigate to your project's **Operations > Kubernetes** page, and ensure that,
+   in addition to "Prometheus" and "Helm Tiller", you also have "Runner" and "Ingress"
+   installed. Once "Ingress" is installed, copy its endpoint.
+1. Navigate to your project's **Settings > CI/CD** page. In the Auto DevOps section,
+   select a deployment strategy and save your changes.
+1. On the same page, in the Variables section, add a variable named `KUBE_INGRESS_BASE_DOMAIN`
+   with the value of the Ingress endpoint you have copied in the previous step. Leave the type
+   as "Variable".
+1. Navigate to your project's **CI/CD > Pipelines** page, and run a pipeline on any branch.
+1. When the pipeline has run successfully, graphs will be available on the **Operations > Metrics** page.
+
 #### About managed Prometheus deployments
 
 Prometheus is deployed into the `gitlab-managed-apps` namespace, using the [official Helm chart](https://github.com/helm/charts/tree/master/stable/prometheus). Prometheus is only accessible within the cluster, with GitLab communicating through the [Kubernetes API](https://kubernetes.io/docs/concepts/overview/kubernetes-api/).