Refresh RAM chart data every X minutes

[aaroncox]

The rest of the RAM page is live updating over time, and I think it'd be nice if the chart did the same.

Maybe we can have the page every few minutes call the API endpoint for the chart, and refresh that data? Then live update the chart as it exists on the page.

This way if you come back to a tab that's been sitting open for a while, it'll have current price data.

[deansallinen]

I'm thinking we could use a service worker and keep it running in the background for this and for other continually refreshing data (network, account)