add lifecycle policy keep count

copy_images.tf

@@ -83,7 +83,8 @@ module "images" {
   image_config     = local.image_config
   tags             = {}
 
-  enable_lifecycle_policy = true
-  lifecycle_policy_all    = true
-  force_delete            = true
+  enable_lifecycle_policy     = true
+  lifecycle_policy_all        = true
+  force_delete                = true
+  lifecycle_policy_keep_count = 3
 }