Sweeping up some small but nasty bugs that only revealed themselves after rich-codex was released into the wild..
- 🐛 Don't use cache in action
actions/setup-pythonstep - 🐛 Bump minimum Python version to 3.9 (may try to drop this in the future) (#19)
- 🐳 Build + tag versioned labels of the Docker image on release
- 📖 Improvements to docs