ip-country-getter.js

const express = require("express");
const { lookup } = require("geoip-lite");

const app = express();

const router = express.Router();

router.get("/some-ip", (req, res) => {
  const ip = req.headers["x-forwarded-for"] || req.connection.remoteAddress;

  const result = lookup(ip);

  res.status(200).json({
    ip,
    ...result,
  });
});

app.use("/", router);
app.listen(5000);