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

docker/README.md

@@ -0,0 +1,22 @@
+# docker/
+
+The Docker Compose stack for advanced mode. See
+[docs/advanced-setup.md](../docs/advanced-setup.md) for the full
+walkthrough.
+
+```
+docker/
+├── docker-compose.yml         Postgres + Redis + server + nginx
+├── docker-compose.cloudflared.yml  Optional: replace nginx with CF Tunnel
+├── Dockerfile.server          Multi-stage: SDK build → admin-ui build → runtime
+├── nginx.conf                 Subdomain routing for *.your-domain
+└── .env.example               Required environment variables
+```
+
+Quick start:
+
+```bash
+cp .env.example .env
+$EDITOR .env
+docker compose up -d
+```