olemus
testimis- ja demotarbeline server rakenduse, andmestu, veebilehe vm ajutiseks paigutamiseks enne ta viimist tööserverile
= a server used to safely test apps, websites, or services in a production-like environment

https://www.lawinsider.com/dictionary/staging-server

ülevaateid
https://www.quora.com/What-is-the-difference-between-a-staging-server-and-a-production-server

https://www.quora.com/What-is-difference-between-testing-environment-and-staging

https://www.techopedia.com/definition/4205/staging-serve

https://en.wikipedia.org/wiki/Deployment_environment#Staging

https://www.gratasoftware.com/what-is-each-server-for-development-test-uat-or-staging-demo-and-production/