Configure sails.js / express.js to run with nginx

Pretty simple:

server {
    listen       80;
server_name  www.example.com;
rewrite ^(.*)$ $scheme://example.com$1;
}

server {
    listen       80;
    server_name  example.com;
    root   /var/www/example;
    index  index.php;
    access_log   /var/log/nginx/example.access.log main;

    #deny access to protected directories
    
    # prevent nginx from serving dotfiles (.htaccess, .svn, .git, etc.)
    location ~ /\. { deny all; access_log off; log_not_found off; }

    #location = /favicon.ico { log_not_found off; access_log off; }

    #avoid processing of calls to unexisting static files by yii
    location ~ (js|css|png|jpg|gif|ico|pdf|zip|rar)$ { try_files $uri =404;}
location ~* \.(ico|css|js|gif|jpe?g|png|swf)$ {expires 30d; access_log off; }
   location / {

#auth_basic "Access";
        #auth_basic_user_file /etc/nginx/.htpasswd;

      proxy_pass http://localhost:1337;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection 'upgrade';
      proxy_set_header Host $host;
      proxy_cache_bypass $http_upgrade;
  }
}