getting-started.md: How to set up a local copy of the website to make changes.

react.md: A short introduction to React.js components with further links if you're new to React.

phenomic.md: Explains how phenomic works and how you can edit the code and the content of postcss.org.

The design directory is the place to start if you would like to contribute with design for postcss.org or to keep up with the latest sketches.

style-guide is built on keeping the designers on track with colors, typography and components for the website.

If you would like to know more about the PostCSS Brand or start contributing for it, there is another repository for that.