In a nutshell...
Progressier works on all your domains right out of the box.
How it works
Under the hood, Progressier uses relative URLs for almost everything. This way, your integration can run on multiple domains and environments simultaneously (including staging and localhost).
About your primary domain
Go to Settings > My PWA > App Details to specify your Primary domain.
This is the domain displayed throughout the dashboard. Generally, you'll want to use your production domain as Primary domain.
Pro tip: to test your integration on a staging domain first, enter your staging domain as Primary domain, and change it once you're ready to push Progressier to production.
Your primary domain is used as follows:
Settings > Get Started: Progressier verifies your integration by making automated requests to your Primary domain.
Installation Page > Installation URL: Progressier redirects your Installation Page to your Primary domain for installation.
Got other domains?
If you want Progressier to run on other domains too, no need to worry. Progressier will handle them all on its own automatically! Progressier can run on your development domains (e.g. localhost:5000 or 127.0.0.1:5000), subdomains (e.g. staging.example.com and development.example.com), or any arbitrary combination of domains (e.g. example.com and test.com).