I have a contact form and i want to upload a html template using the input file and send it with Nodemailer. I have used formidable to get a temporary path but im not able to pass this parameter to the HTML tag of sendMail. How can i archive this ?

This is my current app.js

const express = require('express');
const formidable = require('formidable');
var fs = require('fs');
const port = process.env.PORT || 3000;
const app = express();

app.get('/', (req, res) => {
    res.send(`<h2>With<code>"express"</code>
    npmpackage</h2>
    <form action="/api/upload" enctype="multipart/form-data" method="post">
    <div>Text field title:<input type="text" name="title"/></div>
    <div>File:<input type="file" name="someExpressFiles" multiple="multiple"/>
    </div>
    <input type="submit" value="Upload"/>
    </form>`);
});

app.post('/api/upload', (req, res, next) => {
    const form = new formidable.IncomingForm({ multiples: true });
    form.parse(req, (err, fields, files) => {
        if (err) { next(err); return; }
        res.json({
            fields, files
        });
    });

    async function main() {
        let testAccount = await nodemailer.createTestAccount();
        let transporter = nodemailer.createTransport({
            host: "smtp.ethereal.email",
            port: 587,
            secure: false,
            auth: {
                user: testAccount.user,
                pass: testAccount.pass,
            },
        });

        let info = await transporter.sendMail({
            from: '"Fred Foo