This features adds rfc7807 Problem detail responses when an error happens processing a request.
This will greatly improve the common issues with "blank pages" and "404 pages" issues which should now properly tell the user what input was wrong (group that does not exist, container name that does not exist, etc.)
When an instance does not exist yet and needs to be started, its status is not assumed to be starting anymore.
Instead, the statue will be retrieved from the provider. This changes one thing, it's that you may be able to start and access your services instantly because they'll be instantly seen as ready.
With this change, you might want to make sure that your containers have a proper healthcheck used to determine when the application is able to process incoming requests.
* refactor: add interface guards
* refactor(providers): remove instance.State as a return value from Stop and Start
* test(e2e): add healthcheck on nginx container
Because now the container check is so fast, we need to add a delay on which the container is considered started and healthy to have a proper waiting page.
* fix(tests): using acouvreur/whoami:v1.10.2 instead of containous/whoami:v1.5.0
This image simply retrieve the curl binary from curlimages/curl:8.8.0 to be able to add proper docker healthcheck commands.
Once this is merged with traefik/whoami, I'll update back to the original image.
See https://github.com/traefik/whoami/issues/33
When a container is shutdown manually while it's registered as `ready` in Sablier it will remove it from the store.
Meaning externally events are now handled for docker.
