This is the first major commit after forking the original project. The
script has been almost completely rewritten to add new features.
- Implement AES-256 encryption with configurable PBKDF2 iterations (default 600k).
- Add Telegram integration for status updates and optional file uploads.
- Rework backup logic to use safe `sqlite3 .backup` method.
- Add GitHub Action to build/publish multi-arch Docker images and create
GitHub Releases on git tags.
BREAKING CHANGE: The project is not backward-compatible, configuration
and behavior are entirely different from the original version.
**README**
- Overhaul; changed docs to be better aligned to the new `backup.sh`.
- Add example `docker-compose`.
**Dockerfile**
- Install `zip`.
- Remove installation of `sqlite`.
- Remove unnecessary variables.
**backup.sh**
- Overhaul; now zips all required and recommended files and directories stated at [vaultwarden docs](https://github.com/dani-garcia/vaultwarden/wiki/Backing-up-your-vault).
- Removed deleting old backups; will be added later on in a separate script.
**entrypoint.sh**
- Removed creating folders.
