Set up Zerotier Control UI

Install/configure ztncui[1], with HTTP access allowed from within the
private network.

[1]: https://key-networks.com/ztncui/

nodes/zerotier-1.json

@@ -12,13 +12,14 @@
     "hostname": "zerotier-1",
     "ipaddress": "192.168.122.72",
     "roles": [
-
+      "zerotier_controller"
     ],
     "recipes": [
       "kosmos-base",
       "kosmos-base::default",
       "kosmos_zerotier::controller",
       "kosmos_zerotier::firewall",
+      "kosmos_zerotier::zncui",
       "apt::default",
       "timezone_iii::default",
       "timezone_iii::debian",
@@ -52,4 +53,4 @@
     "recipe[kosmos-base]",
     "role[zerotier_controller]"
   ]
-}
+}