---
phase: 14-postgresql-migration
plan: 02
subsystem: infra
tags: [docker, postgres, docker-compose, dockerfile]

requires:
  - phase: 14-postgresql-migration/01
    provides: PostgreSQL schema and drizzle-pg migrations directory
provides:
  - Docker Compose dev file with PostgreSQL 16 for local development
  - Production Docker Compose with Postgres + app dependency chain
  - Lean Dockerfile without native SQLite build dependencies
affects: [14-postgresql-migration/03, 14-postgresql-migration/04, 14-postgresql-migration/05, 14-postgresql-migration/06]

tech-stack:
  added: [postgres:16-alpine]
  patterns: [docker-compose healthcheck with depends_on condition, externalized secrets via env vars]

key-files:
  created: [docker-compose.dev.yml]
  modified: [docker-compose.yml, Dockerfile]

key-decisions:
  - "Dev compose uses hardcoded credentials (gearbox/gearbox) for simplicity"
  - "Production compose externalizes POSTGRES_PASSWORD via env var"
  - "Removed native build tools (python3/make/g++) since postgres.js is pure JS"

patterns-established:
  - "DATABASE_URL env var pattern for Postgres connection string"
  - "service_healthy dependency for app-to-database startup ordering"

requirements-completed: [DB-05]

duration: 1min
completed: 2026-04-04
---

# Phase 14 Plan 02: Docker & Compose for PostgreSQL Summary

**PostgreSQL 16 Docker Compose for dev and production, lean Dockerfile without native SQLite build dependencies**

## Performance

- **Duration:** 1 min
- **Started:** 2026-04-04T10:23:10Z
- **Completed:** 2026-04-04T10:24:14Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments
- Created docker-compose.dev.yml providing PostgreSQL 16 on localhost:5432 for local development
- Rewrote docker-compose.yml with Postgres service, healthcheck, and app dependency chain for production
- Stripped native build tools (python3/make/g++) from Dockerfile and switched to drizzle-pg migrations

## Task Commits

Each task was committed atomically:

1. **Task 1: Create Docker Compose files for dev and production** - `50b451b` (feat)
2. **Task 2: Update Dockerfile and entrypoint for PostgreSQL** - `186e74b` (feat)

## Files Created/Modified
- `docker-compose.dev.yml` - Development Postgres service with hardcoded dev credentials
- `docker-compose.yml` - Production Postgres + app services with externalized secrets
- `Dockerfile` - Removed native build deps, copies drizzle-pg instead of drizzle

## Decisions Made
- Dev compose uses hardcoded credentials (gearbox/gearbox) for zero-friction local development
- Production compose externalizes POSTGRES_PASSWORD via environment variable substitution
- No changes needed to entrypoint.sh since it already runs the generic migrate.ts script

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Docker infrastructure ready for PostgreSQL-based development and production
- Developers can run `docker compose -f docker-compose.dev.yml up` to start local Postgres
- Dockerfile ready to build once drizzle-pg migrations directory exists from Plan 01

---
*Phase: 14-postgresql-migration*
*Completed: 2026-04-04*
