feat: update readme

# Openslice Pod Metrics Dashboard (Grafana)

To visualize Kubernetes pod metrics for Openslice, you have the following options:

A dashboard to visualize Kubernetes pod metrics and logs.

## Option 1: Use Grafana Dashboard ID

## Prerequisites

1. Open your Grafana instance.

2. Go to **"Import"**.

3. Enter dashboard ID `14350`.

4. Select your Prometheus data source.

5. In the **"namespace"** dropdown, select `openslice`.

- **Grafana**  

  A running Grafana instance (v7.0+ recommended).  

- **Prometheus data source**  

  - Must be added in Grafana and scraping your cluster’s metrics (e.g. via kube-prometheus or another Prometheus setup).  

- **Loki data source** 

  - Must be added in Grafana to include pod logs alongside metrics.  

- **Kubernetes metrics exposure**  

  - Metrics-server or Prometheus exporters installed so that Prometheus can scrape pod-level metrics.  

This option includes a dashboard with metrics only.

## Import Dashboard from JSON

## Option 2: Use the Predefined JSON Dashboard

1. Locate the file:  

   `kubernetes/helm/openslice/files/observability/grafana_osl_dashboard.json`

2. In Grafana, go to **"Import"**.

3. Upload or paste the JSON content.

4. This version may need some more work since you may have to configure the Prometheus and Loki data sources.

This option includes a dashboard with both metrics and logs.

1. In your Grafana UI, click **“Import”**.  

2. Under **“Upload JSON file”**, select  

   `kubernetes/helm/openslice/files/observability/grafana_osl_dashboard.json`.  

3. Choose your **Prometheus** data source.  

4. Choose your **Loki** data source.  

5. Click **“Import”**.

6. In the **“namespace”** variable dropdown, select `openslice`.