Do You Even Need That Express Custom Server Any More?
summary
Concrete migration steps and working examples that replace an Express custom server with Next API routes: show secure env vars via a root .env, deploy serverless routes to Vercel, and migrate Express server to Next API routes with the same GET/POST/dynamic handlers. Demonstrate MongoDB + Mongoose adjustments (connection reuse and a mongoose connection guard plus try/catch model compilation) and replicate auth using Auth0 with nextjs-auth0 cookie auth. All examples compile and run locally and on Vercel as serverless functions.
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chapters (4)
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