Traefik simple failover/fallback server

Hi,

I've been using traefik for a few days know, and I'm really amazed by what it can do.

However I can't find anywhere on the documentation how to use a fallback server on a service. What I mean about fallback, is that if a server is down (health check does not work or ping or...), I want to follow all the traffic to the fallback server.

There's an issue here:

Here's what nginx has to offer for my usecase :
https://nginx.org/en/docs/http/ngx_http_upstream_module.html

What can I do to overcome this issue?

Best regards,