text: // server.js
  const next = require("next")
  const routes = require("./routes")
  const app = next({ dev: process.env.NODE_ENV !== "production" })
  const handler = routes.getRequestHandler(app)
  
  // Without express
  const { createServer } = require("http")
  app.prepare().then(() => {
    createServer(handler).listen(3000)
  })
  