Convert Grafana steps in Lab 2 to use an arkade app

[alexellis]

The approach and image for Grafana is now ancient. Fortunately there is an arkade app available.

Users may have to load the dashboard manually using the UI, we can include screenshots for this.

So I am looking for a volunteer to convert the Grafana steps in Lab 2 to use an arkade app.

[cpanato]

i can take this one

[alexellis]

Thank you. I've been using https://tinypng.com/ to shrink the PNGs in blog posts etc recently to make download times on conference WiFi better.