configure NGINX to reverse proxy connections from port 80 to other port

gistfile1.txt

server {
    listen 80;
    server_name hoge.hoge.com; # or server_name subdomain.yourapp.com;

    location / {
        proxy_pass http://localhost:1337; # port > 1024
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        # Enables WS support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_redirect off;
    }
}