Testing Environment for live apps

When you have a functioning environment with users, and you want to add features - it’s too risky to edit the live app. Things break (regularly) and introduce vulnerabilities into a live site. There needs to be a function that allows the current stable version of the app to stay operational while the branch and features you developing sit in a version - which you the. Publish after all your testing is complete - any modified data tables migrate accord etc. the only work around currently is to clone the app - and export all data and import it again into the cloud app - not an easy task. To make a truly professional app that you can update in the background safely - this is essential.