Detect if sidekiq has zero processors and give everything a kick

[iHiD]

@ErikSchierboom Have a think about this :)

This tells us if we have processors: https://github.com/mperham/sidekiq/wiki/API#processes

So if we check that every 10s, and it's 0 for 6 times in a row (1m) then we should trigger a redeploy?

[iHiD]

A nicer idea might be to build this check on the sidekiq container.

• So we have an HTTP server on the sidekiq docker.
• It checks using the API above to see if its process is listed
• If it is, it returns 200
• If not, it returns 500
• Then we use standard ALB healthchecks on that (they ping every 10s and 6 failures triggers the restart etc)

[ErikSchierboom]

This has been implemented now.