feat: Flat import of markdown repo

This is a flat (without history) import of (some of) the content
from our markdown module.

We've imported this without history because the repo contains our
blog posts and showcases posts content prior to porting them to strapi.

Since this contains many images, it would balloon the size of this repo
to import the full history.

Instead, please refer to the history of the (archived) markdown repo
at: https://github.com/freesewing/markdown

markdown/dev/tutorials/getting-started-linux/start-development-environment/en.md

@@ -0,0 +1,30 @@
+---
+title: Start the development environment
+order: 50
+---
+
+You will have a new folder that has the name you picked for your pattern.
+If you chose `test`, you will have a `test` folder. If you chose `banana`, you'll have a `banana` folder.
+
+If you enter that folder, you'll find a couple of subfolders:
+
+ - `config` holds your pattern's configuration file
+ - `src` holds your pattern's source code
+ - `example` holds the development environment
+
+To start the development environment, enter the `example` folder and run: `npm run start` (or `yarn start` if you're using Yarn as a package manager.
+
+The development environment will watch for any changes you make to
+the pattern's source code. When you do, it will update automatically in your browser.
+
+<Note>
+
+##### Yay, you're done!
+
+All you have to do now, is design your pattern.
+Thankfully, we have a tutorial for that too:
+
+ - [Pattern design tutorial](/tutorials/pattern-design/): A step-by-step guide to designing your first pattern
+
+</Note>
+