Extend /healthcheck

[Aciid]

/healthcheck
Consumer: Docker-compose / Orchestrator / Azure ACI
Basic check for required service reachability. eg. database which is deployed with the API-instance.
Return standardised response, http-code

/healthcheck/delivery
Consumer: Kraftwerk
Check route for deployment readiness. Return deployment status for ordered products from manifest and readiness for integration-api checks ( can Rasenmaeher reach deployed products. )

/healthcheck/services
Consumer: Testing, Prometheus?, Admin React UI?
Polling route that returns status of all deployed products and integrated service routes.

[karppo]

healthchecks extended. Once we get more stuff as backend services we need to add those from some sort of manifest to sqliteDB.
#24