Add Consul lookup for ads dns allowlist

nomad/blocky/config.yml

@@ -30,6 +30,10 @@ blocking:
       - https://perflyst.github.io/PiHoleBlocklist/regex.list
     malware:
       - https://mirror1.malwaredomains.com/files/justdomains
+  whiteLists:
+    # Move to Gitea when deployed internally
+    ads:
+{{ keyOrDefault "blocky/whitelists/ads" "# None" | indent 6 }}
   clientGroupsBlock:
     default:
       - ads