We have a feature in STORM which allows you to use a preview URL/temporary URL for a website so you can show it to your client without having to do any setup of DNS/changing of the site or editing the clients hosts file.  This feature is not designed to use for developing a site, just for showing off your sparkly new site.

From the STORM Dashboard, click on the cog icon next to your website to manage the hosting for that website. 

From the website dashboard, scroll down and you'll see the section for Client Preview URL.  Click the button to toggle Preview mode on, it will take a second or two to process as it makes the changes, and it will then update with the temporary URL you'll be able to use to access the website using that URL.