feat: parameterize UT server data

cmd/urbanterror-agones/main.go

@@ -8,6 +8,8 @@ import (
 
 func main() {
 	verbose := flag.Bool("v", false, "Enable debug verbosity")
+	host := flag.String("s", "localhost", "UT server hostname")
+	port := flag.Int("p", 27960, "UT server port")
 	flag.Parse()
 
 	level := slog.LevelInfo
@@ -23,7 +25,7 @@ func main() {
 		),
 	)
 
-	if err := StartAgonesSidecar(); err != nil {
+	if err := StartAgonesSidecar(*host, *port); err != nil {
 		slog.Error("Agones sidecar error", "error", err)
 	}
 }