Looking for general guidance on compiling a separate Node express app (to be served on an EC2 instance) that is part of a Next codebase.

Backstory: split application into separate projects, each with their own pacakge.json and tsconfig.json with a shared library that is a private npm package. But that has several limitations, which I won't detail here. So putting them back together into a single project, but want to be able to build the next app for deployment on Vercel, and a Node app for deployment on EC2 (for long running services).