Setup health checks for all images #68
Description
With offspot/overview#16 we know need to decide when the containers stack is OK.
We do this by checking the status of all expected containers. If they report OK, then it's OK. If not, we wait for them to be up for at least 5s (arbitrary value).
because this means it adds 5 seconds to the boot of every Hotspot, this should only be a fallback.
At the moment, only the dashboard provides an healthcheck. We should set one in place for all containers