Install extra plugins

Extra Grafana plugins can be installed as follows:

1. Go to https://app-catalogue.cern.ch
2. Select your Grafana project
3. Make sure you are in the Administrator view (not Developer) then navigate to Workloads -> Pods
4. Select the Grafana pod (there should be only one)
5. Select Terminal tab
6. Install the plugin using the plugin's installation instructions. It will typically be a command such as: grafana-cli plugins install my-plugin. Simply run the relevant commands in the terminal window.
7. Complete installation by running kill 1 to restart the container and thus Grafana itself