better host upstream support

backend/internal/api/handler/hosts.go

@@ -87,6 +87,11 @@ func CreateHost() func(http.ResponseWriter, *http.Request) {
 			return
 		}
 
+		if newHost.UpstreamID > 0 {
+			// nolint: errcheck, gosec
+			newHost.Expand([]string{"upstream"})
+		}
+
 		configureHost(newHost)
 
 		h.ResultResponseJSON(w, r, http.StatusOK, newHost)