anchor.diff:  <% if fetch(:enable_ssl) %>
   server {
     server_name <%= fetch(:server_name) %>;
  +  listen 443;
     listen [::]:443;
     root <%= fetch(:deploy_to) %>/current/public;
   
  
positive.code: <% if fetch(:force_ssl, false) %>
  server {
    server_name <%= fetch(:server_name) %>;
    listen [::]:80;
    ## redirect http to https ##
    rewrite ^ https://$server_name$request_uri? permanent;
  
negative.code: <% else %>
  server {
    server_name <%= fetch(:server_name) %>;
    listen 80;
    listen [::]:80;
    root <%= fetch(:deploy_to) %>/current/public;
  
  