updating firewall on ACR

Author: ryhud

quickstart/201-machine-learning-moderately-secure/workspace.tf

@@ -39,6 +39,11 @@ resource "azurerm_container_registry" "default" {
   resource_group_name      = azurerm_resource_group.default.name
   sku                      = "Premium"
   admin_enabled            = true
+
+  network_rule_set {
+    default_action = "Deny"
+    }
+  public_network_access_enabled = false
 }
 
 # Machine Learning workspace