Visualisations for historical data

[iainp999]

Next level: now that we have some stored historical data, I wonder whether it would be worth looking at something like https://www.chartjs.org/ to put together some simple visualisations?

Or, we could get the data into grafana :)

[alex-moreno]

This would be very useful to integrate with the statuses page. I was thinking about adding a dashboard, maybe this is the way