server.js

/* eslint-disable @typescript-eslint/no-var-requires */
/* eslint-disable i18next/no-literal-string */
const express = require("express")
const { createProxyMiddleware } = require("http-proxy-middleware")
const next = require("next")

const port = process.env.PORT || 3004
const dev = process.env.NODE_ENV !== "production"
const app = next({ dev })
const handle = app.getRequestHandler()

const apiPaths = {
  "/api": {
    target: "http://localhost:3001",
    pathRewrite: {
      "^/api": "/api",
    },
    changeOrigin: true,
  },
}

const isDevelopment = process.env.NODE_ENV !== "production"

app
  .prepare()
  .then(() => {
    const server = express()

    if (isDevelopment && process.env.USE_LOCAL_PROXY) {
      server.use("/api", createProxyMiddleware(apiPaths["/api"]))
    }

    server.all("*", (req, res) => {
      return handle(req, res)
    })

    server.listen(port, (err) => {
      if (err) {
        throw err
      }
      console.log(`> Ready on http://localhost:${port}`)
    })
  })
  .catch((err) => {
    console.log("Error:::::", err)
  })