nginx.conf.erb

upstream <%= app %> { server 127.0.0.1:<%= port %>; }

<% if use_ssl %>
server {
  listen      [::]:80;
  listen      80;
  server_name <%= hostname %>;
  return 301 https://$host$request_uri;
}
<% end %>

server {
  <% if use_ssl %>
  listen      [::]:443;
  listen      443;
  <% else %>
  listen      [::]:80;
  listen      80;
  <% end %>
  server_name <%= hostname %>;
  
  <% if use_ssl %>
  ssl on;
  ssl_certificate     <%= File.join(ssl, 'server.crt') %>;
  ssl_certificate_key <%= File.join(ssl, 'server.key') %>;
  ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-RC4-SHA:ECDHE-RSA-AES128-SHA:AES128-GCM-SHA256:RC4:HIGH:!MD5:!aNULL:!EDH:!CAMELLIA;
  ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
  ssl_prefer_server_ciphers on;
  <% end %>

  location / {
    proxy_pass  http://<%= app %>;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $http_host;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header X-Forwarded-Port $server_port;
    proxy_set_header X-Request-Start $msec;
  }
}