snapshots.conf

    location / {
      if ($request_method = 'OPTIONS' ) {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Origin, Accept, User-Agent, Cache-Control, Keep-Alive';
        add_header 'Content-Length' 0;
        add_header 'Content-Type' 'text/plain charset=UTF-8';
        return 204;
      }

      proxy_pass                 http://127.0.0.1:3000/;
      proxy_set_header           X-Real-IP   $remote_addr;
      proxy_set_header           X-Forwarded-For  $proxy_add_x_forwarded_for;
      proxy_set_header           X-Forwarded-Proto  $scheme;
      proxy_set_header           X-Forwarded-Server  $host;
      proxy_set_header           X-Forwarded-Host  $host;
      proxy_set_header           Host  $host;

      client_max_body_size       10m;
      client_body_buffer_size    128k;

      proxy_connect_timeout      90;
      proxy_send_timeout         90;
      proxy_read_timeout         90;

      proxy_buffer_size          4k;
      proxy_buffers              4 32k;
      proxy_busy_buffers_size    64k;
      proxy_temp_file_write_size 64k;

      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'Content-Type, Origin, Accept, User-Agent, Cache-Control, Keep-Alive';
   }