This guide moves the local service to another port and points the app at it. Use it when 4317 is taken or you run two checkouts side by side.

​
Move the service

Set REDACT_QVAC_PORT when you start it:
The service always binds to 127.0.0.1. It can’t be reached from other machines. For the sandboxed service, the same variable works:

​
Point the app at it

The browser reads the service URL from NEXT_PUBLIC_REDACT_QVAC_URL. Next.js inlines NEXT_PUBLIC_* variables when it compiles, so set it on the command that builds or serves the app:
For a production build, set it on npm run build, not only on npm run start.

​
Change the app’s port

The app port is independent of the service:
The service accepts requests from any http://localhost:* or http://127.0.0.1:* origin, so no service change is needed. If you run the browser tests against another app port, set REDACT_BASE_URL, for example REDACT_BASE_URL=http://localhost:3200.