Run WordPress site with any given domain name by setting two constants in wp-confing.php

wp-config.php

<?php
// Snippet [...]

// Use any provided domain name from request as the site URL without redirection 
// Note: Your Apache/Nginx or whatever server has to be configured to serve any chosen domain names from same document root directory
if( isset($_SERVER['HTTP_HOST']) ) {
	define('WP_HOME', "{$_SERVER['REQUEST_SCHEME']}://{$_SERVER['HTTP_HOST']}");
	define('WP_SITEURL', WP_HOME);
}