write a health-check for national-parks

[ericcalabretta]

I'd be good to have a meaningful health check for national-parks to better visualize the status in Automate.

It'd also be good to use the health-check in the demo in some meaningful way, Like start with a failing health-check, promote a package or make a change that corrects that issue ending with an "ok" status.

[smford22]

@ericcalabretta Do you think the health check story should be an alternate to the CSS update, or an add-on to CSS update?

[ericcalabretta]

I think that'd be more compelling and show off the reporting part of the solution better. We certainly should have a meaningful health-check so we can tell when we've broken the demo too.

We could have the start of the demo have some health-check failure & the change we show is ether changing source/watching the build process or promoting a pre-built package. Either way we'd show in the UX the nodes turn red->green.

The Apps tab is still a little green so we may not want to switch over to this immediately but it would show more of a real workflow.