vue's development build is used for production

[QuentinRoy]

Describe the bug

When serving the built files, vue seems to warn us that we are still using the dev version.

You are running a development build of Vue.
Make sure to use the production build (*.prod.js) when deploying for production.

And indeed, vue's dev tools does work. I have tried to manually set node's env to production, but it made no difference.

To Reproduce
Steps to reproduce the behavior:

pnpm create slidev test
cd test
pnpm build
pnpm dlx serve dist

Desktop (please complete the following information):

• OS: macOS
• Browser: Arc
• Slidev version: 0.48.2