Enable code line log

main.go

@@ -27,6 +27,8 @@ import (
 
 // main start a gRPC server and waits for connection
 func main() {
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+
 	configFile := flag.String("config-file", "", "path to configuration file")
 	etcdURL := flag.String("etcd-url", "", "etcd URL")
 	flag.Parse()