fix: standard streams for new process and error message

internal/upgrader/upgrade.go

@@ -257,5 +257,7 @@ func (u *Upgrader) PerformCoreUpgrade(tarPath string) (err error) {
 
 	// gracefully restart
 	cmd := exec.Command(os.Args[0])
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
 	return cmd.Start()
 }

main.go

@@ -77,6 +77,9 @@ func main() {
 		Addresses: []string{fmt.Sprintf("%s:%d", cSettings.ServerSettings.Host, cSettings.ServerSettings.Port)},
 	})
 	if !errors.Is(err, context.DeadlineExceeded) {
-		panic(err)
+		if !errors.Is(err, net.ErrClosed) {
+			panic(err)
+		}
+		logger.Error(err)
 	}
 }