---
phase: 17-docker-deployment
plan: 01
subsystem: infra
tags: [docker, nextjs, standalone, neon, postgres, health-check]

# Dependency graph
requires:
  - phase: 01-foundation
    provides: db/index.ts lazy singleton and Drizzle setup
provides:
  - next.config.ts with output standalone for Docker three-stage build
  - db connection pool capped at 5 for Neon free tier
  - GET /api/health endpoint for Docker HEALTHCHECK directive
  - @vercel/blob dead dependency removed from package.json
affects: [17-02-docker-files, Dockerfile, docker-compose.yml]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Health endpoint pattern: public GET /api/health with SELECT 1 DB ping, 200/503 response"
    - "Neon pool limit: postgres(url, { max: 5 }) leaves headroom for migrations on free tier"

key-files:
  created:
    - teressa-copeland-homes/src/app/api/health/route.ts
  modified:
    - teressa-copeland-homes/next.config.ts
    - teressa-copeland-homes/src/lib/db/index.ts
    - teressa-copeland-homes/package.json

key-decisions:
  - "output: 'standalone' added to next.config.ts — required for Dockerfile three-stage build to produce self-contained server.js"
  - "postgres pool max: 5 — Neon free tier allows 10 connections; 5 leaves headroom for migrations and overlapping deploys"
  - "@vercel/blob removed — confirmed not imported anywhere in src/; BLOB_READ_WRITE_TOKEN excluded from .env.production.example"
  - "Health endpoint is intentionally public (no auth) so Docker HEALTHCHECK can reach it without credentials"

patterns-established:
  - "Health check: SELECT 1 via Drizzle sql template tag, wrapped in try/catch, 200 ok / 503 error"

requirements-completed: [DEPLOY-01, DEPLOY-02, DEPLOY-04]

# Metrics
duration: 2min
completed: 2026-04-03
---

# Phase 17 Plan 01: Docker Deployment Prep Summary

**Standalone Next.js output, Neon pool cap at 5, @vercel/blob removal, and public GET /api/health endpoint with SELECT 1 DB check**

## Performance

- **Duration:** 2 min
- **Started:** 2026-04-03T22:52:56Z
- **Completed:** 2026-04-03T22:53:49Z
- **Tasks:** 2
- **Files modified:** 4

## Accomplishments

- Added `output: 'standalone'` to `next.config.ts` (prerequisite for Dockerfile three-stage build)
- Limited Neon postgres pool to `max: 5` in `src/lib/db/index.ts` to prevent connection exhaustion on free tier
- Removed dead `@vercel/blob` dependency (7 packages removed, confirmed not imported anywhere in src/)
- Created `GET /api/health` at `src/app/api/health/route.ts` — runs `SELECT 1` via Drizzle, returns 200 or 503

## Task Commits

Each task was committed atomically:

1. **Task 1: Enable standalone output, limit DB pool, remove @vercel/blob** - `fa7d6a9` (feat)
2. **Task 2: Create /api/health endpoint with DB connectivity check** - `57326d7` (feat)

## Files Created/Modified

- `teressa-copeland-homes/next.config.ts` - Added `output: 'standalone'`; kept existing `transpilePackages` and `serverExternalPackages`
- `teressa-copeland-homes/src/lib/db/index.ts` - Changed `postgres(url)` to `postgres(url, { max: 5 })`
- `teressa-copeland-homes/package.json` - Removed `@vercel/blob: ^2.3.1` from dependencies
- `teressa-copeland-homes/src/app/api/health/route.ts` - New public GET endpoint, SELECT 1 via Drizzle, 200/503 response

## Decisions Made

- Health endpoint is intentionally public (no auth import, no session check) so Docker HEALTHCHECK can reach it without credentials
- Kept `transpilePackages` and `serverExternalPackages` intact in next.config.ts per plan spec

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None — TypeScript compiled clean (`npx tsc --noEmit` passed with no output).

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Plan 17-02 (Dockerfile, docker-compose.yml, .dockerignore, .env.production.example) can proceed immediately
- All code-level prerequisites for the Docker build are now in place
- Dockerfile builder stage will find `output: 'standalone'` in next.config.ts
- `docker-compose.yml` HEALTHCHECK can target `http://localhost:3000/api/health`

---
*Phase: 17-docker-deployment*
*Completed: 2026-04-03*