Implement Traefik Dashboard and Traefik API on the test server (with password, but documented in public)

[fititnt]

See:

• https://docs.traefik.io/operations/dashboard/

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Traefik have an dashboard and API that may be exposed in a unsecure way in public. On this issue, we should on the test server add both the Traefik Dashboard and Traefik API with password.

While this obviously should not be done in production, as long as we dont have problems (and we're unlikely to have) we can leave it open for who read the documentation.

This behavior may be changed later if we start to have more containers (or have semi-private data) on the dashboards