docs: add readme

.gitignore

@@ -4,6 +4,7 @@ node_modules
 # Build directory
 build/
 dist/
+day9tv-optimizer.zip
 
 # Misc
 .DS_Store

README.md

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+# Day9.tv Optimizer
+
+A simple extension that provides some UX benefits to https://day9.tv/ visitors.
+
+[Chrome Web Store](https://chrome.google.com/webstore/detail/day9tv-optimizer/jaehlnfcnnapnhookcomgmmmkojebdla)
+
+## Configuration
+
+### Accessibility
+
+#### Font Contrast
+
+Increases font contrast across the website to comply with WCAG AAA standard where possible. ([Contrast checker](https://webaim.org/resources/contrastchecker/))
+
+#### Font Improvements
+
+Some miscellaneous improvements to fonts that didn't fit anywhere else.
+
+### Quality of Life
+
+#### Form Scaling
+
+Scale WYSIWYG input fields' height according to content.
+
+## Development setup
+
+Requires Yarn & Node.js
+
+Running `yarn dev` starts webpack in watch mode and outputs the bundle in `build` folder.
+
+Running `yarn build` builds a production version of the extension and outputs the bundle in `dist` folder.
+
+For further info how to work with extensions visit [Getting Started - Google Chrome](https://developer.chrome.com/extensions/getstarted).