chore: hard-code git.unkin.net path (#346)

- dirty fix, set git.unkin.net in hosts file template
- avoid hairpint nat

Reviewed-on: #346

site/profiles/templates/base/hosts.erb

@@ -4,6 +4,7 @@
 <%= @facts['networking']['ip'] %> <%= @fqdn %> <%= @hostname %>
 127.0.0.1 localhost.localdomain localhost
 127.0.0.1 localhost4.localdomain4 localhost4
+198.18.19.17 git.unkin.net
 
 <% @additional_hosts.each do |host| -%>
 <%= host['ip'] %>  <%= host['hostname'] %>  <%= host['aliases'].join(' ') if host['aliases'] %>