docs: Update README.

README.md

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 [![Netlify status](https://api.netlify.com/api/v1/badges/187b6eca-cd6e-41ef-af45-6ccd34aa77d7/deploy-status)](https://app.netlify.com/sites/pedantic-lichterman-c7bee0/deploys)
 
-My personal website. View at [zachsnoek.com](https://www.zachsnoek.com).
+Welcome! This is the repository for my [personal website and blog](https://www.zachsnoek.com).
+
+I rebuilt the current version of my site from scratch in 2022, and it allowed me to:
+
+* Learn Next.js and how to use it for SSG
+* Solidify my CSS skills by building components with styled-components
+* Create interactive blog posts by using MDX to add React components to posts
+* Add dynamic Open Graph preview images to my posts by using Cloudinary
+
+## Tools and technologies used
+
+My site uses the following languages, tools, and technologies:
+
+* Next.js (for SSG)
+* TypeScript
+* styled-components
+* Reach UI (for building accessible components)
+* MDX (for adding JSX in blog posts)
+* Cloudinary (for dynamically generating Open Graph images)
+* GoatCounter (for analytics)
+* Mirrorful (for theming)
+* lint-staged and husky (for enforcing Conventional Commits)
+* Netlify
+* MailChimp
+
+## Running locally
+
+To run locally, run `yarn && yarn dev`.