aInterface/routes/imageCaptcha.js

const express = require('express')
const router = express.Router()
const imageCaptch = require('svg-captcha')

router.get('/', async (req, res) => {
    const svgimg = imageCaptch.create({
        size: 4,
        ignoreChars: 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
        noise: 2,
        color: true
    })
    req.session.imgtext = svgimg.text
    res.send(svgimg.data)
})

module.exports = router