Platform & DevOps·Pipelines, promotion and GitOps
opening the pull request created a whole running copy at its own URL, and merging it destroyed the copy.
Ephemeral environment
Also calledpreview environment, review app, on-demand environment
A full environment created per branch or pull request and torn down when it is no longer needed. It removes the shared staging queue and lets non-engineers look at a change before it merges, which is usually its highest-value property. It requires the whole stack to be genuinely reproducible from code, including data seeding, which is why it is a good forcing function and a lot of work.