Secure vnc, add compress output

ubuntu/ubuntu-20.04-amd64.json

@@ -33,13 +33,19 @@
             "ssh_username": "ubuntu",
             "type": "qemu",
             "vm_name": "{{ user `template` }}",
-			"vnc_bind_address": "0.0.0.0",
+			"vnc_bind_address": "{{ user `vnc_bind_address` }}",
             "qemuargs": [
               [ "-m", "{{ user `memory` }}" ],
               [ "-display", "{{ user `qemu_display` }}" ]
             ]
         }
     ],
+    "post-processors": [
+        {
+            "type": "compress",
+            "output": "{{.BuildName}}.gz"
+        }
+    ],
     "provisioners": [
         {
             "environment_vars": [
@@ -72,14 +78,15 @@
         "https_proxy": "{{env `https_proxy`}}",
         "iso_checksum": "28ccdb56450e643bad03bb7bcf7507ce3d8d90e8bf09e38f6bd9ac298a98eaad",
         "iso_name": "ubuntu-20.04.4-live-server-amd64.iso",
-        "memory": "1024",
+        "memory": "2048",
         "mirror": "http://releases.ubuntu.com",
         "mirror_directory": "focal",
         "name": "ubuntu-20.04-amd64",
         "no_proxy": "{{env `no_proxy`}}",
         "preseed_path": "preseed.cfg",
         "qemu_display": "none",
-        "template": "ubuntu-20.04-amd64",
-        "version": "TIMESTAMP"
+        "template": "ubuntu-20.04-amd64.img",
+        "version": "TIMESTAMP",
+        "vnc_bind_address": "127.0.0.1"
     }
 }