How to build curlconverter?

Question

Node.js

There is a curlconverter library . I need to embed it on my site. How can I compile it into one js file. Googled all night, but nothing came up. I only found out that it is accepted that every js developer must write his own fundamentally new ̶o̶p̶e̶r̶a̶ts̶i̶o̶n̶n̶u̶yu̶ ̶s̶i̶s̶t̶e̶m̶u̶ build system. So that's why it's such a mess.

I also analyzed their site https://curl.trillworks.com/ . Main.min.js is connected there. In it, both the library itself and event handlers - changes in the select value, changing the text in the textarea. Of course, I can connect this min file to my site and override events, but working with min.js files is such a pleasure.

So how and with what can you build this library?