In plain words
The short answer
CodeCross LLC treats leaving Replit as four piles. GitHub gets the files — not Secret values, not Database rows. The Secrets tool encrypts keys as environment variables, names the app reads at start. Editor Secrets do not copy to a published app; add those in the Publishing pane. A published app gets its own production Database. App Storage holds uploads. Done means the app starts on a host you pay for and the Repl can stay closed.