Captcha in MEAN js
<p>I need to use Captcha in MEAN js login. I need the simplest possible way to make it work. I saw <a href="https://github.com/emotionLoop/visualCaptcha-node/" rel="nofollow">Visual Captcha</a> but I'm not able to understand where should I use it in the MEAN js application.</p>

<p>I need an offline captcha solution on MEAN js app. I plan to deploy it on a raspberry pi.</p>