feat: add premium Next.js scaffold to Domain_web

Bundle geoexport-premium (Docker, docs, Next.js) alongside the
working static site mirror; production VPS install still uses site/.

Co-authored-by: Cursor <cursoragent@cursor.com>

premium/docs/CONTRIBUTING.md

@@ -0,0 +1,72 @@
+# Contributing to GeoExport
+
+Thanks for helping improve GeoExport. This project aims for production-grade quality — clear PRs, tested behavior, and docs that match the code.
+
+## Ways to contribute
+
+- Report bugs and gaps in [GitHub Issues](https://github.com/andrey271192/geoexport/issues)
+- Improve docs (README, `docs/`, API examples)
+- Port UI features from [Domain_web](https://github.com/andrey271192/Domain_web) into Next.js
+- Implement API routes and Prisma models
+- Add tests for parsers, export formatters, and routing generator
+
+## Development setup
+
+```bash
+git clone https://github.com/andrey271192/geoexport.git
+cd geoexport
+cp .env.example .env
+npm install
+npm run dev
+```
+
+Open http://localhost:3000
+
+### With Docker data services only
+
+```bash
+docker compose up -d postgres redis
+# Run app on host:
+npm run dev
+```
+
+## Branching
+
+- `main` — stable, deployable
+- `feat/*` — features
+- `fix/*` — bug fixes
+- `docs/*` — documentation only
+
+## Pull request checklist
+
+- [ ] `npm run lint` passes
+- [ ] `npm run build` succeeds
+- [ ] User-facing changes documented in README or `docs/`
+- [ ] No secrets, `.env`, or large binary blobs committed
+- [ ] PR description explains **why**, not only **what**
+
+## Code style
+
+- **TypeScript** strict mode
+- **React** — functional components, hooks
+- **Tailwind** — utility-first; use shadcn patterns for forms/dialogs
+- **API routes** — validate input, return consistent JSON errors
+- Keep diffs focused; avoid drive-by refactors
+
+## Commit messages
+
+Use [Conventional Commits](https://www.conventionalcommits.org/):
+
+```
+feat(api): add lookup rate limiter
+fix(export): handle empty category
+docs: update Docker deployment steps
+```
+
+## Security
+
+Do not open public issues for vulnerabilities. See [SECURITY.md](./SECURITY.md).
+
+## License
+
+By contributing, you agree that your contributions are licensed under the [MIT License](../LICENSE).