How to build locally and deploy the result to Vercel?

[borekb]

We have a monorepo structure that is not supported by Vercel yet (I am aware of the progress being made on vercel/vercel#3547). Is it possible to build lambdas locally and then just publish the result to Vercel? That would be a good workaround in the meantime but I'm not sure how to do it.

In other words, after I run next build, then how to publish the result to Vercel?

Note: it's not a static project that could be next export-ed.