Add Prometheus doc (#4276)

* Update package reference doc package sequence

* Add Prometheus doc

* Address doc comments

docs/content/en/docs/reference/packagespec/_index.md

@@ -10,10 +10,12 @@ description: >
 
 | Name                       | Description                | Versions                  | GitHub                      |
 |----------------------------|----------------------------|---------------------------|-----------------------------|
-| [Harbor]({{< relref "./harbor" >}}) | Harbor is an open source trusted cloud native registry project that stores, signs, and scans content. | [v2.5.0]({{< relref "./harbor/v2.5.0.md" >}})<br> [v2.5.1]({{< relref "./harbor/v2.5.1.md" >}}) | https://github.com/goharbor/harbor<br>https://github.com/goharbor/harbor-helm |
-| [MetalLB]({{< relref "./metallb" >}}) | MetalLB is a virtual IP provider for services of type `LoadBalancer` supporting ARP and BGP. | [v0.12.1]({{< relref "./metallb/v0.12.1.md" >}}) | https://github.com/metallb/metallb/ |
-| [Emissary Ingress]({{< relref "./emissary" >}}) | Emissary Ingress is an open source `Ingress` supporting API Gateway + Layer 7 load balancer built on Envoy Proxy. | [v0.3.0]({{< relref "./emissary/v0.3.0.md" >}}) | https://github.com/emissary-ingress/emissary/ |
 | [ADOT]({{< relref "./adot" >}}) | ADOT Collector is an AWS distribution of the OpenTelemetry Collector, which provides a vendor-agnostic solution to receive, process and export telemetry data. | [v0.21.1]({{< relref "./adot/v0.21.1.md" >}}) | https://github.com/aws-observability/aws-otel-collector |
+| [Cert-manager]({{< relref "./cert-manager" >}}) | Cert-manager is a certificate manager for Kubernetes clusters. | [v1.9.1]({{< relref "./cert-manager/v1.9.1.md" >}}) | https://github.com/cert-manager/cert-manager |
 | [Cluster Autoscaler]({{< relref "./cluster-autoscaler" >}}) | Cluster Autoscaler is a component that automatically adjusts the size of a Kubernetes Cluster so that all pods have a place to run and there are no unneeded nodes. | [v9.21.0]({{< relref "./cluster-autoscaler/v9.21.0.md" >}}) | https://github.com/kubernetes/autoscaler |
+| [Emissary Ingress]({{< relref "./emissary" >}}) | Emissary Ingress is an open source `Ingress` supporting API Gateway + Layer 7 load balancer built on Envoy Proxy. | [v0.3.0]({{< relref "./emissary/v0.3.0.md" >}}) | https://github.com/emissary-ingress/emissary/ |
+| [Harbor]({{< relref "./harbor" >}}) | Harbor is an open source trusted cloud native registry project that stores, signs, and scans content. | [v2.5.0]({{< relref "./harbor/v2.5.0.md" >}})<br> [v2.5.1]({{< relref "./harbor/v2.5.1.md" >}}) | https://github.com/goharbor/harbor<br>https://github.com/goharbor/harbor-helm |
+| [MetalLB]({{< relref "./metallb" >}}) | MetalLB is a virtual IP provider for services of type `LoadBalancer` supporting ARP and BGP. | [v0.12.1]({{< relref "./metallb/v0.12.1.md" >}}) | https://github.com/metallb/metallb/ |
 | [Metrics Server]({{< relref "./metrics-server" >}}) | Metrics Server is a scalable, efficient source of container resource metrics for Kubernetes built-in autoscaling pipelines. | [v3.8.2]({{< relref "./metrics-server/v3.8.2.md" >}}) | https://github.com/kubernetes-sigs/metrics-server |
-| [Cert-manager]({{< relref "./cert-manager" >}}) | Cert-manager is a certificate manager for Kubernetes clusters. | [v1.9.1]({{< relref "./cert-manager/v1.9.1.md" >}}) | https://github.com/cert-manager/cert-manager |
+| [Prometheus]({{< relref "./prometheus" >}}) | Prometheus is an open-source systems monitoring and alerting toolkit that collects and stores metrics as time series data. | [v2.39.1]({{< relref "./prometheus/v2.39.1.md" >}}) | https://github.com/prometheus/prometheus |
+

docs/content/en/docs/reference/packagespec/prometheus/_index.md

@@ -0,0 +1,12 @@
+---
+title: "Prometheus Configuration"
+linkTitle: "Prometheus"
+weight: 20
+description: >
+---
+
+Prometheus is an open-source systems monitoring and alerting toolkit. It collects and stores metrics as time series data.
+
+{{< content "../best_practice.md" >}}
+
+### Configuration options for Prometheus