docs: Add README

Author: AugustoL

README.md

@@ -1 +1,30 @@
-# openscan-docs
+# OpenScan Docs
+
+Official documentation for [OpenScan](https://openscan.io) — an open-source, trustless, and privacy-respecting blockchain explorer.
+
+## Tech Stack
+
+- [Next.js 16](https://nextjs.org/) (static export)
+- [React 19](https://react.dev/)
+- [Tailwind CSS 4](https://tailwindcss.com/)
+- [Radix UI](https://www.radix-ui.com/)
+- [TypeScript](https://www.typescriptlang.org/)
+
+## Getting Started
+
+```bash
+pnpm install
+pnpm dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) in your browser.
+
+## Deployment
+
+The site is deployed to GitHub Pages via GitHub Actions on every push to `main`.
+
+Live at: [openscan-explorer.github.io/docs](https://openscan-explorer.github.io/docs)
+
+## License
+
+See [LICENSE](./LICENSE) for details.