External libraries in a function node

I set up a couple of RSS feeds to post in my Discord server (yeah, after all those years i figured out how to do it finally), but one of them output HTML on its article.description property.

When i was forwarding that to discord with a node.js script i used GitHub - mixmark-io/turndown: 🛏 An HTML to Markdown converter written in JavaScript to convert the html string to markdown to pretty print on Discord, but how i can use that library on a function node on Node.RED? Gemini says i should run the habitual npm install command, but i dont know in what folder.

You can just specify the module by name.

See: Use any npm module in Node-RED • FlowFuse

thanks a lot!