Yoga Docs: Rename website-next to website (#1613)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1613

So that GitHub links to edit a page point to the right place.

This will fail in OSS build until I switch the directory used by Vercel instance, but I am waiting to do that until ready to land, since that would cause other in progress changes to fail when exported.

Reviewed By: joevilches

Differential Revision: D54837857

fbshipit-source-id: 9bec90232dbe3ec8638568685671185d597fcf2d

website/docs/styling/width-height.mdx

@@ -0,0 +1,37 @@
+---
+sidebar_position: 14
+---
+
+import Playground from '@site/src/components/Playground';
+
+# Width and Height
+
+The width property specifies the width of the node's border box (the collective size of the node's content, padding, and border).
+Similarly height property specifies the height of the node's border box.
+
+Both width and height can take following values:
+
+**Auto**: The default Value, Yoga calculates the width/height for the node based
+on its content, whether that is other children, text, or an image.
+
+**Pixels**: Defines the width/height in absolute pixels. Depending on other properties set on
+the Yoga node this may or may not be the final dimension of the node.
+
+**Percentage**: Defines the width or height in percentage of its [containing block's](/docs/advanced/containing-block) width or height respectively.
+
+<Playground code={`<Layout config={{useWebDefaults: false}}>
+  <Node
+    style={{
+      width: 200,
+      height: 200,
+      padding: 10,
+    }}>
+    <Node
+      style={{
+        margin: 5,
+        height: 50,
+        width: 50,
+      }}
+    />
+  </Node>
+</Layout>`} />