chore: add GPL v2 license

LICENSE

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+GNU GENERAL PUBLIC LICENSE
+Version 2, June 1991
+
+Copyright (C) 2026 Eddie Nielsen
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+[...]
+
+(⚠️ VIGTIGT: den fulde GPL v2 tekst er meget lang — du skal bruge hele den officielle)
+
+👉 Brug den officielle her:
+https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
+

README.md

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+<p align="center">
+  <img src="images/dockervault-logo.png" alt="DockerVault logo" width="420">
+</p>
+
+# DockerVault
+
+Simple, reliable backups for Docker environments.
+
+---
+
+## 🚀 What is DockerVault?
+
+DockerVault is a lightweight backup system designed to make Docker backups simple, transparent, and predictable.
+
+It helps you:
+
+* Discover Docker containers automatically
+* Backup volumes, bind mounts, and configurations
+* Keep track of backup history
+* Restore data safely when needed
+
+Built for homelabs and small-scale infrastructure.
+
+---
+
+## ✨ Features (planned)
+
+* 🔍 Auto-discovery of Docker containers
+* 💾 Backup of volumes and bind mounts
+* 🧠 Smart selection of what to back up
+* 📦 Incremental backups (future)
+* 🔁 Restore system
+* 🖥 Multi-node support (future)
+
+---
+
+## 🏗 Architecture
+
+DockerVault follows a simple flow:
+
+1. Scan Docker environment
+2. Identify containers, volumes, and mounts
+3. Store metadata (SQLite)
+4. Execute backups
+5. Restore when needed
+
+More details: `docs/architecture.md`
+
+---
+
+## ⚡ Quick Start (coming soon)
+
+```bash
+git clone git@git.lanx.dk:ed/dockervault.git
+cd dockervault
+
+# planned commands
+dockervault init
+dockervault scan
+dockervault backup
+```
+
+---
+
+## 📁 Project Structure
+
+```
+dockervault/
+├── cmd/
+├── core/
+├── scanner/
+├── backup/
+├── restore/
+├── config/
+├── database/
+├── docs/
+└── scripts/
+```
+
+---
+
+## 🧩 Roadmap
+
+See `docs/roadmap.md`
+
+---
+
+## 🤝 Philosophy
+
+DockerVault is built on a few simple principles:
+
+* Keep it simple
+* Be transparent
+* Avoid unnecessary complexity
+* Build something we actually want to use
+
+No magic. No hidden behavior.
+
+---
+
+## 📜 License
+
+GNU General Public License v2.0