# Phase 12: Hardening

**Status:** ⬜ Not Started
**Parent plan:** [PLAN.md](./PLAN.md)
**Domain:** backend

## Objective
Production hardening — blue-green deploys, promote flow, dashboard auth, graceful shutdown, structured logging, and config export.

## Tasks

- [ ] Task 1: Blue-green deploys — start new container, health check, swap NPM proxy, then stop old container (zero downtime)
- [ ] Task 2: Promote flow — enforce `promote_from` for production deploys (only tags running in source stage are eligible)
- [ ] Task 3: Dashboard auth — basic auth or token-based authentication for the web UI
- [ ] Task 4: Auth middleware — protect all /api/* routes except webhook
- [ ] Task 5: Graceful shutdown — handle SIGTERM/SIGINT, drain in-progress deploys, close DB, stop poller
- [ ] Task 6: Structured logging — JSON logs with deploy context (project, stage, tag, instance ID)
- [ ] Task 7: Config export — download current SQLite state as YAML (reverse of seed import)
- [ ] Task 8: Dockerfile — multi-stage build (build frontend + Go, copy to minimal image)
- [ ] Task 9: docker-compose.yml — production-ready compose file with volumes, network, env
- [ ] Task 10: Final wiring review — ensure all services are properly initialized and shut down

## Files to Modify/Create
- `internal/deployer/bluegreen.go` — blue-green deploy strategy
- `internal/deployer/promote.go` — promote flow logic
- `internal/api/auth.go` — authentication middleware
- `internal/config/export.go` — config export to YAML
- `internal/logging/logger.go` — structured JSON logger
- `cmd/server/main.go` — graceful shutdown, structured logging init
- `Dockerfile` — multi-stage build
- `docker-compose.yml` — production compose file

## Acceptance Criteria
- Blue-green: zero downtime during deploy (old container serves until new one is healthy)
- Promote: production deploy only accepts tags from the specified source stage
- Auth: unauthenticated requests to /api/* (except webhook) return 401
- Graceful shutdown: in-progress deploys complete before exit
- Logs are JSON-formatted with contextual fields
- Config export produces valid YAML that could be re-imported
- Docker image builds and runs correctly

## Notes
- Blue-green: keep old container running until new one passes health check, then swap NPM proxy and stop old
- Auth: start simple (basic auth via env var), can be enhanced later (JWT, OIDC)
- SIGTERM handling: use Go's `os/signal` + `context.WithCancel`
- Structured logging: use `log/slog` (Go stdlib since 1.21)
- Dockerfile: build stage with Node.js + Go, runtime stage with scratch/alpine
- This is the FINAL phase — build and full test suite MUST pass here

## Review Checklist
- [ ] All tasks completed
- [ ] Blue-green deploy handles rollback if new container fails
- [ ] Auth doesn't block webhook endpoint
- [ ] Graceful shutdown tested with concurrent deploys
- [ ] Dockerfile produces a minimal image
- [ ] docker-compose.yml matches the example in PLAN.md

## Handoff to Next Phase
<!-- This is the final phase — no handoff needed. -->