You can access the Custom Domain feature on the arrow located by the side of the Publish/Visit page button, as you can see in the image below:
Root domains (apex domains) and subdomains are supported.
For more detailed information, please refer to the table below. You simply need to replace "example.com" with your own domain:
Here are some general steps to follow in order to set up your custom domain on your domain host:
After successfully verifying the configuration check, simply click on the 'finish setup' button, and you'll be able to test the new URL link for your project.