external_url 'http://superawesomedomain.com:2345'
nginx['listen_port'] = 2345
nginx['proxy_set_headers'] = {
 "Host" => "$http_host",
 "X-Real-IP" => "$remote_addr",
 "X-Forwarded-For" => "$proxy_add_x_forwarded_for",
 "X-Forwarded-Proto" => "https",
 "X-Forwarded-Ssl" => "on"
}