Fix healtz for multiple remotes, as long as one remote is unhealthy all are flagged as unhealthy

router.go

@@ -66,24 +66,28 @@ func (router *Router) Healthz(w http.ResponseWriter, r *http.Request) {
 		}
 
 		healthy := true
+		for _, remote := range host.Remotes {
 			var url string
 			if host.Secure {
-			url = fmt.Sprintf("https://%s:%d/healthz", host.Remotes, host.Port)
+				url = fmt.Sprintf("https://%s:%d/healthz", remote, host.Port)
 			} else {
-			url = fmt.Sprintf("http://%s:%d/healthz", host.Remotes, host.Port)
+				url = fmt.Sprintf("http://%s:%d/healthz", remote, host.Port)
 			}
 
 			res, err := router.client.Get(url)
 			if err != nil {
 				log.Warn().Err(err).Int("port", host.Port).Msg("Unhealthy")
 				healthy = false
+			} else if res.StatusCode != 200 {
+				healthy = false
+			}
 		}
 
 		for _, domain := range host.Domains {
 			result = append(result, struct {
 				Domain  string
 				Healthy bool
-			}{domain, healthy && res.StatusCode == 200})
+			}{domain, healthy})
 		}
 	}