minimal-express-setup.js

const express = require("express")
const helmet = require("helmet")

const server = express()

server.set("query parser", "extended")

server.use(helmet())

server.use(express.json())

server.use(express.urlencoded({ extended: true }))

server.use((request, response) => {
  response.status(404).send({
    error: {
      code: 404,
      message: "Not Found",
    },
  })
})

server.use((error, request, response, next) => {
  console.error(error)
  next(error)
})

server.use((error, request, response, next) => {
  if (response.headersSent) {
    next(error)
    return
  }

  const result = {
    code: error.code || 500,
    message: error.message || "Internal Server Error",
  }

  response.status(result.code).send({
    error: {
      code: result.code,
      message: result.message,
    },
  })
})

server.listen(5004)