Use a custom domain
When setting up a Staas.io Stack, it’s assigned a .st4as.com sub-domain based on your app’s name, which is convenient for testing purposes. However, for a production environment, you’d prefer your application to be accessible through your own domain.
Let’s see how you can direct traffic to your site from your desired domain.
Set a CNAME record
First, let’s get your current domain name. You can find your current staas’s domain name in your dashboard: 
The easiest way to direct traffic to your site is by creating a CNAME record for your custom domain that points to your .st4as.com host. For instance, if your custom domain is awesome.com and your app is named myawesomeapp7520, you can set up a CNAME record in awesome.com’s DNS settings like this:
CNAME @ myawesomeapp7520.stack-ap2.st4as.com
You’ll need to configure this with your DNS provider.
Now, accessing awesome.com will tell the DNS system to look up myawesomeapp7520.stack-ap2.st4as.com and return its results.