docs: add prometheus + grafana deployment guide

Author: EyalPazz

site-src/guides/metrics-and-observability.md

@@ -151,6 +151,18 @@ We currently have 2 types of prometheus deployments documented:
 1. Self Hosted using the prometheus helm chart
 2. Using Google Managed Prometheus
 
+    A simple grafana deployment can be done with the following commands:
+     ```bash
+          helm repo add grafana https://grafana.github.io/helm-charts
+          helm install grafana grafana/grafana --namespace monitoring
+     ```
+
+    We currently have 2 types of prometheus deployments documented
+    1. Self Hosted using the prometheus helm chart
+    2. Using Google Managed Prometheus
+
+### Prometheus
+
 === "Self-Hosted"
 
     Add the prometheus-community helm repository:
@@ -162,11 +174,11 @@ We currently have 2 types of prometheus deployments documented:
     Deploy the prometheus helm chart using this command:
      ```bash
         helm install prometheus prometheus-community/prometheus \
-         --namespace monitoring \
+         --namespace monitoring --create-namespace \
          -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/raw/main/config/manifests/prometheus/values.yaml
      ```
 
-    You can add the prometheus data source to grafana following [This Guide](https://grafana.com/docs/grafana/latest/administration/data-source-management/).
+    You can add the prometheus data source to grafana following [This Guide](https://grafana.com/docs/grafana/latest/administration/data-source-management/)
     The prometheus server host is by default `http://prometheus-server`
 
     Notice that the given values file is very simple and will work directly after following the [Getting Started Guide](https://gateway-api-inference-extension.sigs.k8s.io/guides/), you might need to modify it
@@ -178,8 +190,8 @@ We currently have 2 types of prometheus deployments documented:
 
 ## Load Inference Extension dashboard into Grafana
 
-Please follow [grafana instructions](https://grafana.com/docs/grafana/latest/dashboards/build-dashboards/import-dashboards/) to load the dashboard json.
-The dashboard can be found here [Grafana Dashboard](https://github.com/kubernetes-sigs/gateway-api-inference-extension/blob/main/tools/dashboards/inference_gateway.json)
+    Please follow [grafana instructions](https://grafana.com/docs/grafana/latest/dashboards/build-dashboards/import-dashboards/) to load the dashboard json.
+    The dashboard can be found here [Grafana Dashboard](https://github.com/kubernetes-sigs/gateway-api-inference-extension/blob/main/tools/dashboards/inference_gateway.json)
 
 ## Prometheus Alerts