- update-Nitrov3.sh: build CMS into .next-staging and swap atomically so a
failed build never takes the live site down; auto-merge new variables
from .env.example; validate env for duplicates/broken lines; restart the
emulator/CMS only when rebuilt or unhealthy; fix step renumbering
- next.config.ts: support NEXT_DIST_DIR for staged production builds
- fix all TS errors (unused imports, missing tryDownloadCandidates helper)
so tsc and the production build pass clean
- add Dockerfile/.dockerignore and switch docker-compose to a CMS container
- include prevailing UI/refactor changes (SurfaceCard, ticketing, tsconfig)
