Add initial documentation and structure for DorkNet project

- Create README.md for project overview and setup instructions
- Add admin-ui/README.md for admin UI details and development setup
- Introduce client-mod/README.md explaining the MelonLoader mod functionality
- Establish docker/README.md for Docker setup and configuration
- Create docs/README.md to index project documentation
- Implement advanced-setup.md for Docker stack configuration
- Document architecture in architecture.md
- Provide easy-setup.md for hosting instructions
- Add FAQ.md for common questions and legal considerations
- Create joining-a-server.md for player connection instructions
- Establish troubleshooting.md for common issues and resolutions
- Introduce easy-app/README.md for the unified desktop application
- Add server/README.md for ASP.NET Core backend details
- Document tools/README.md for CLI helper scripts

admin-ui/README.md

@@ -0,0 +1,36 @@
+# admin-ui/
+
+React + Vite + Tailwind SPA. Talks to `/api/admin/v1/*` on the server.
+
+Embedded into:
+1. The standalone server's `wwwroot/admin/` (advanced mode), served at
+   `https://admin.<your-domain>/`.
+2. The Easy desktop app via a Photino WebView (host mode admin tab).
+
+## Dev
+
+```bash
+npm install
+npm run dev    # http://localhost:5173, proxies /api → :5000
+```
+
+Start the server first; Vite's proxy doesn't synthesize endpoints.
+
+## Build
+
+```bash
+npm run build  # dist/ — copied into server/wwwroot/admin by the
+               # server's CI publish step, and into easy-app/Resources/
+               # by tools/build-easy-app.ps1
+```
+
+## Stack notes
+
+- React 18 + Vite 5 + TypeScript
+- Tailwind 3 with a custom dark `ink/brand` palette in `tailwind.config.js`
+- React Router 6
+- No external component library; primitives in `src/components/`
+- No state library beyond per-page `useState` + `useApi`
+
+See [docs/architecture.md](../docs/architecture.md) for how the SPA is
+delivered in both modes.