Un-hardcode the copier image

Signed-off-by: Dimitris Karakasilis <dimitris@karakasilis.me>

main.go

@@ -52,10 +52,12 @@ func main() {
 	var metricsAddr string
 	var enableLeaderElection bool
 	var probeAddr string
-	var serveImage, toolImage string
+	var serveImage, toolImage, copierImage string
 	var copyToPodLabel, copyToNamespace, copyToPath, copierRole string
 
 	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
+
+	flag.StringVar(&copierImage, "copier-image", "quay.io/kairos/kubectl", "The image that is used to copy artifacts to the server pod.")
 	flag.StringVar(&serveImage, "serve-image", "nginx", "Serve image.")
 	// It needs luet inside
 	flag.StringVar(&toolImage, "tool-image", "quay.io/kairos/osbuilder-tools:latest", "Tool image.")
@@ -106,6 +108,7 @@ func main() {
 		Client:       mgr.GetClient(),
 		ServingImage: serveImage,
 		ToolImage:    toolImage,
+		CopierImage:  copierImage,
 		ArtifactPodInfo: controllers.ArtifactPodInfo{
 			Label:     copyToPodLabel,
 			Namespace: copyToNamespace,