How to easily display Image from Node JS

I can’t find a simple solution how to display an image on my website.
I can read it in my node js backend but it will download the file instead of placing in my img tag.

Do you have a simple solution for that?
Thank you very much!

HTML

let cell6 = document.createElement("td");
    cell6.innerHTML = `<img src={http://localhost:4001/getImage/pexels-cottonbro-4065175.jpg}></img>`;

NODE JS

const fs = require("fs");
require("dotenv").config();

module.exports = (req, res) => {
    fs.readFile(
        `../backend/images/${req.params.id}`,

        function (err, image) {
            if (err) {
                throw err;
            }
            console.log(image);
            res.send(image);
        }
    );
};