---
phase: 06-deployment
plan: 01
subsystem: infra
tags: [docker, docker-compose, adapter-node, sveltekit, alpine]

# Dependency graph
requires:
  - phase: 01-foundation
    provides: SQLite database configuration
  - phase: 03-images
    provides: Image storage paths
provides:
  - Docker multi-stage build configuration
  - Production Node.js server via adapter-node
  - docker-compose for single-command deployment
  - Environment variable configuration for data paths
affects: [06-02-health-endpoint]

# Tech tracking
tech-stack:
  added: ["@sveltejs/adapter-node"]
  patterns: ["Multi-stage Docker builds", "Non-root container user", "Environment variable prefixes"]

key-files:
  created:
    - Dockerfile
    - .dockerignore
    - docker-compose.yml
  modified:
    - svelte.config.js
    - src/lib/server/db/index.ts
    - src/lib/server/images/storage.ts

key-decisions:
  - "TASKPLANER_ prefix for environment variables via adapter-node envPrefix"
  - "Multi-stage Docker build for smaller production image"
  - "Non-root 'nodejs' user (UID 1001) for container security"
  - "Named volume taskplaner_data for persistent data"

patterns-established:
  - "Environment variables: Use TASKPLANER_ prefix for all app config"
  - "Data paths: Read from TASKPLANER_DATA_DIR with ./data fallback"

# Metrics
duration: 2min
completed: 2026-02-01
---

# Phase 6 Plan 1: Docker Configuration Summary

**Multi-stage Docker build with adapter-node, non-root user, and environment variable configuration for production deployment**

## Performance

- **Duration:** 2 min 14 sec
- **Started:** 2026-02-01T12:18:40Z
- **Completed:** 2026-02-01T12:20:54Z
- **Tasks:** 3
- **Files modified:** 6

## Accomplishments
- Switched SvelteKit to adapter-node for production Node.js server
- Created multi-stage Docker build with node:22-alpine base
- Configured docker-compose with named volume for data persistence
- Unified data path configuration via TASKPLANER_DATA_DIR environment variable

## Task Commits

Each task was committed atomically:

1. **Task 1: Switch to adapter-node with environment prefix** - `3b9f434` (feat)
2. **Task 2: Create Docker configuration files** - `5e31b69` (feat)
3. **Task 3: Update data paths for environment variable configuration** - `457baca` (feat)

## Files Created/Modified
- `svelte.config.js` - Configured adapter-node with envPrefix: 'TASKPLANER_'
- `Dockerfile` - Multi-stage build, non-root user, HEALTHCHECK
- `.dockerignore` - Build context exclusions
- `docker-compose.yml` - Single-service compose with taskplaner_data volume
- `src/lib/server/db/index.ts` - Read DATA_DIR from environment
- `src/lib/server/images/storage.ts` - Read DATA_DIR from environment

## Decisions Made
- Used TASKPLANER_ prefix for environment variables (matches adapter-node envPrefix)
- Alpine-based image for smaller size (though 285MB due to sharp native dependencies)
- Non-root nodejs user with UID 1001 for security
- HEALTHCHECK configured for /health endpoint (to be created in Plan 02)

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
- Docker image size is 285MB instead of target <250MB. This is due to sharp native module dependencies which are necessary for image processing functionality. Acceptable tradeoff.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- Docker configuration complete
- Ready for Plan 02: Health endpoint and deployment documentation
- HEALTHCHECK references /health endpoint which needs implementation

---
*Phase: 06-deployment*
*Completed: 2026-02-01*
