Sorry bud, been a trifle busy making plugins. 
Right,
cd /etc/nginx/conf.d
Hopefully you end up in a folder called conf.d
Type
ls
Hopefully you'll see a file called default...
sudo nano techiewiz.in
Paste the following
server {
listen 80;
server_name techiewiz.in;
location / {
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;
proxy_pass http://<yourserversIPaddress>:<port_number>/;
proxy_redirect off;
# Socket.IO Support
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}
Ctrl+x to exit
cd ~
sudo service nginx restart
You should get Nginx Service Restarting [ok]
Try loading your website.