staging and production, each serving the version you deploy there.
These environments are isolated from each other, with their own model and integration credentials, environment variables, and access settings. Your end users can keep using a stable version in production while you test the next one in staging.
How Deployment Works
Deployment starts with a publish: each publish creates a version, a snapshot of the app at that moment. Deploying pins a version to an environment. When deploying an app, you choose the version, provide the credentials and environment variable values the app uses there, and the environment serves that version until you deploy another: a newer one to update it, or an earlier one to roll back. For example, you might publish a version namedv1.2 and deploy it to staging to test it. Once it’s verified, you deploy the same v1.2 to production. Later publishes keep flowing into built-in, but production stays on v1.2.
What You Can Deploy
These limits apply only to deployed environments. A version that doesn’t fit can’t be deployed.