restore YAML frontmatter

notes/dark-mode/index.mdx

@@ -1,9 +1,17 @@
-export const frontmatter = {
-  title: "How To: Add Dark Mode to a Website 🌓",
-  date: "2021-10-15 08:56:33-0400",
-  description: "Simple dark mode switching using local storage, OS preference detection, and minimal JavaScript.",
-  tags: ["JavaScript", "NPM", "CSS", "Dark Mode", "How To", "Tutorial"],
-};
+---
+title: "How To: Add Dark Mode to a Website \U0001F313"
+date: "2021-10-15 08:56:33-0400"
+description: >-
+  Simple dark mode switching using local storage, OS preference detection, and
+  minimal JavaScript.
+tags:
+  - JavaScript
+  - NPM
+  - CSS
+  - Dark Mode
+  - How To
+  - Tutorial
+---
 
 Love it or hate it, it seems that the [dark mode fad](https://en.wikipedia.org/wiki/Light-on-dark_color_scheme) is here to stay, especially now that more and more devices have [OLED screens](https://www.macrumors.com/2019/10/21/ios-13-dark-mode-extends-iphone-battery-life/) that display true blacks... which means that these trendsetters might go blind from your site's insanely white background if you're behind the curve and don't offer your own dark mode.