NB: It seems you have your DNS/subdomains set up incorrectly. githire.com returns nothing while www.githire.com works. Be sure to set one of them to the canonical url for seo purposes.
Edit: on EC2, much better to set up an elastic IP as described below.
Better to use amazon's Elastic IP. Simply 1) create one, 2) assign it to the EC2 instance of your choice, 3) add the Elastic IP as your A record as the parent post suggests.