I have created one windows instance at amazon lightsail.There I have installed wordpress using IIS. Now I want to run my wordpress site on a the following name: "mysite" . I have added this on wp_config.php file. But when I was trying it through browser it is providing the following error:

This site can’t be reached mysitewp’s server IP address could not be found. Try running Windows Network Diagnostics.

DNS_PROBE_FINISHED_NXDOMAIN

How can i solve it?