chore: Port FreeSewing.dev to docusaurus

The replaces the NextJS site powering FreeSewing.dev with a Docusaurus
setup. It's part of my efforts to simplify FreeSewing's setup so we can
focus on our core value proposition.

sites/dev/docs/tutorials/pattern-design/part1/nodejs/readme.mdx

@@ -0,0 +1,41 @@
+---
+title: Installing NodeJS
+order: 10
+---
+
+FreeSewing is a JavaScript project, so you need JavaScript to work with it.
+You certainly already have JavaScript on your system. In your browser to be
+precise. You can switch this website theme from light to dark mode, and
+that would not work without JavaScript.
+
+As a **user** of FreeSewing, this is all you need. To develop with FreeSewing
+you are going to need to be able to run JavaScript *outside* the browser using
+a JavaScript *runtime*. Which just means a thing that can *run* JavaScript.
+
+We are going to be using [NodeJS](https://nodejs.org/) in this tutorial. It is
+the most established of the different JavaScript runtimes. But there's also 
+other runtimes like [Deno](https://deno.com/) or [Bun](https://bun.sh/). 
+
+## Install
+If you don't have NodeJS on your system, you can go to
+[NodeJS.org](https://nodejs.org/) and follow the install instructions.
+
+:::tip
+
+##### NodeJS versions
+
+You need Node.js 18 (lts/hydrogen) or higher to use FreeSewing
+
+If you're looking to use different versions, I can recommend using `nvm` which makes this very easy: https://github.com/nvm-sh/nvm
+
+:::
+
+## Test
+
+To test whether NodeJS is installed, and see it's version, you can run this command:
+
+```sh
+node -v
+```
+
+If you get the Node.js version number, that means NodeJs is installed. Yay!