build(confidence-engine): add production container packaging

docs/current-handoff.md

@@ -3,6 +3,20 @@
 > **Role:** Concise operational snapshot for resuming work today. Not a historical diary.
 > The design evolution archive index at `docs/design-evolution/README.md` provides progressive loading of experiment history; load the relevant chapter only when a specific historical question requires it.
 
+## v0.62d production Docker packaging established
+
+- `Dockerfile` — minimal multi-stage Alpine build (Node 22), Next.js standalone output mode
+- `.dockerignore` — excludes dev artefacts, secrets, docs from build context
+- `next.config.mjs` — added `output: 'standalone'` (required for lean production container)
+- `.env.example` — reorganized: Supabase → Ollama → Mock sections; Ollama vars now tracked as deployment-relevant
+- **npm production build: PASS** ✓
+- **Docker image build: BLOCKED** — no Docker runtime on development machine (apparatus limitation, not product defect)
+- Production container starts / `/api/health` smoke test: pending Docker runtime availability
+- No persistent application volume required
+- Supabase remains external, Ollama remains private and server-reachable
+- Public `NEXT_PUBLIC_*` variables may require build-time injection via `--build-arg` as established by the implementation (baked into browser bundle)
+- **No deployment performed yet**
+
 ## CURRENT MVP DIRECTION
 
 Initial-decomposition hardening is frozen for the current MVP stage.