main is the shared sandbox the dev server follows; /cdn is built only from PRODUCTION_BRANCH (default
production), which moves when someone promotes: git push origin main:production. The container watches
that branch and rebuilds /cdn once it has held a new commit for CDN_AUTOBUILD_MINUTES (default 2; 0 = the
admin button only); a failed commit is not retried automatically. The build fetches the branch into its
own ref (never touching the dev server's FETCH_HEAD) and uses that commit's own exclusion list, so
loosening it takes a promotion too. DEPLOY.md documents the promote step.
Laptop (bun run dev, zero config); a shared cloud dev server (Docker or Coolify, with a persistent /data);
public embeds from /cdn or any static host; the built folder inside a site's public/, as DX-life does.
Each with the command, what you get, and the detailed doc.
