next.js

80bc175d - Exit `next dev` with a non-zero code when next.config.js is invalid (#83602)

Exit `next dev` with a non-zero code when next.config.js is invalid (#83602) In `next dev`, we're currently ignoring the exit code of the spawned child process, and always exiting with `0` instead. We should exit the process with the child's exit code instead. This is relevant when the `next.config.js` is invalid, for example.