Domains and previews
Understand what a temporary preview exposes and what a stable domain promises to its users.
From a port to a preview
An application listens on a port. A preview routes a browser request to that application so a person can inspect it. Check both the process and the application response before sharing a link.
A domain is a stable entry
A custom domain gives people a recognizable address. Configure its DNS and platform binding, then verify the returned public route. Do not guess a deployment address from a name.
Access is a separate decision
A reachable address does not imply that everyone should have permission to use it. Decide whether the route is public, authenticated or shared through a limited token.
Connect the right resource
The Connections lab helps distinguish a domain, a database binding and a persistent volume. Each connection has a different job.