You have a main application on Vite, and separately Next.js — have you had to delve into the build process? What tools are Vite and Next.js built upon?

Vite and Next.js are modern tools for frontend building, but with different architectures and goals.

• Vite is built on top of esbuild for fast development and uses Rollup under the hood for production builds. esbuild provides very fast transformation and bundling thanks to being written in Go and utilizing modern browser APIs (ES modules).

• Next.js is based on Webpack (up to version 13), but with the release of Next.js 13 and Turbopack (an experimental bundler from Vercel, written in Rust), it is transitioning to faster tools. Next.js is a framework with server-side rendering, routing, and API, with build being just part of its functionality.

Delving deeper, one can study Webpack configurations in Next.js, Vite plugins and how they optimize module loading, as well as how esbuild and Turbopack accelerate builds through parallelism and native implementations.