Be aware: Expressing the purpose through the domain name may not be the only thing you need to do. If you use extensions from other sources than Shopware Store or use extensions that require a monthly fee directly to the manufacturer, you need to talk to these third parties separately and ask for their consent.
Creating a test environment as described above is intended to set up a single, short-lived environment during development or test changes before they go live.
You need a slightly different bahamas telegram screening approach in bigger projects that use continuous integration, usually run a permanent staging environment and more complex database setups.
The Professional and Enterprise Edition of Shopware 6 include so-called "Wildcards" that allow fully licensed and public staging systems for these kinds of projects.
Shopware Professional or Shopware Enterprise, Shopware 6 allows you to avoid the so-called "open heart surgery" in your live system. Take advantage of it, check updates or the installation of new extensions before they are deployed and live – and save yourself a lot of headaches.
Good luck, and do not hesitate to ask your questions in our forums!