Drone CI and linting (#14)

cmd/giredored/main.go

@@ -29,7 +29,9 @@ func main() {
 	// CTRL+C handler.
 	signalHandler := make(chan os.Signal, 1)
 	shutdownDone := make(chan bool, 1)
+
 	signal.Notify(signalHandler, os.Interrupt, syscall.SIGTERM)
+
 	go func() {
 		<-signalHandler
 		httpserver.Shutdown()