prepare for deployment: mobile-friendly, accessible, fly.io ready
- update README: friendlier framing, remove condescending language
- add mobile responsiveness: viewport meta, responsive CSS, larger tap targets
- create Dockerfile: two-stage build for minimal production image
- make OAuth production-ready: configurable redirect URI via env var
- add fly.toml: deployment config with production OAuth callback
- create justfile: deploy and dev commands
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>