Maintenance Release

- ⬆ Update composer to 1.10.8-r0
- ⬆ Update php to 7.3.20-r0
- ⬆ Update nginx to 1.18.0-r0
- ⬆ Update base to 8.0.1

Questions? Join our Discord server! https://discord.me/hassioaddons

[Full Changelog][changelog]

[changelog]: https://github.com/hassio-addons/addon-bookstack/compare/v0.4.3...v0.4.4