pirate-station/.planning/phases/01-foundation/01-01-SUMMARY.md

---
phase: 01-foundation
plan: 01
subsystem: infra
tags: [go, docker, http, multi-stage-build, health-check]

# Dependency graph
requires: []
provides:
  - Go HTTP server with health check endpoint
  - Multi-stage Dockerfile for ARM64/x86_64 builds
  - Project structure following Go conventions
affects: [01-02-docker-compose, 02-cli-tool, 03-authentication]

# Tech tracking
tech-stack:
  added: [golang-1.19, debian-bookworm-slim]
  patterns: [multi-stage-docker, health-check-endpoint, non-root-container]

key-files:
  created:
    - go.mod
    - cmd/server/main.go
    - internal/health/handler.go
    - docker/Dockerfile
    - .dockerignore
  modified: []

key-decisions:
  - "Use Go stdlib only (no external dependencies) for minimal footprint"
  - "Health check verifies /data volume mount before reporting healthy"
  - "Multi-stage build with golang:1.25-bookworm and debian:bookworm-slim"
  - "Non-root user (appuser) in container for security"

patterns-established:
  - "internal/ for private packages, cmd/ for executables"
  - "Health endpoint returns JSON with status field"
  - "Static binary compilation with CGO_ENABLED=0 and -ldflags for cross-platform portability"

# Metrics
duration: 11min
completed: 2026-02-03
---

# Phase 1 Plan 1: Foundation Summary

**Go HTTP server with health check running on port 32768, multi-stage Dockerfile for isolated containerization**

## Performance

- **Duration:** 11 min
- **Started:** 2026-02-03T08:54:53Z
- **Completed:** 2026-02-03T09:06:07Z
- **Tasks:** 2/2
- **Files modified:** 5

## Accomplishments

- Go module initialized with clean project structure (cmd/, internal/)
- HTTP server with root endpoint and health check verifying data volume mount
- Multi-stage Dockerfile optimized for cross-platform builds (x86_64 and ARM64)
- Static binary compilation with security best practices (non-root user, CGO disabled)
- All code uses Go stdlib only - no external dependencies

## Task Commits

Each task was committed atomically:

1. **Task 1: Initialize Go project with HTTP server** - `2691ded` (feat)
2. **Task 2: Create multi-stage Dockerfile** - `38edbf6` (feat)

**Plan metadata:** (will be added in final commit)

## Files Created/Modified

- `go.mod` - Go module definition for github.com/acty/pirate-station
- `cmd/server/main.go` - HTTP server entry point with root and health endpoints
- `internal/health/handler.go` - Health check handler verifying /data volume mount
- `docker/Dockerfile` - Multi-stage build with golang:1.25-bookworm → debian:bookworm-slim
- `.dockerignore` - Excludes .git, planning docs, and build artifacts from Docker context

## Decisions Made

1. **Go stdlib only**: No external dependencies to minimize binary size and maintain simplicity for initial foundation
2. **Health check design**: Returns 503 when /data not mounted, 200 when healthy - enables container orchestration readiness probes
3. **Port 32768**: High port chosen to avoid conflicts with other Pi services (per context discussion)
4. **Debian slim over Alpine**: Better compatibility for debugging, acceptable size tradeoff (~80MB vs ~5MB)

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Installed Go toolchain**

- **Found during:** Task 1 (Go module initialization)
- **Issue:** Go not installed on system - `go: command not found` prevented module initialization
- **Fix:** Installed golang-go from Debian repos (version 1.19.8) using apt-get
- **Files modified:** System packages only
- **Verification:** `go version` returns 1.19.8, `go build` succeeds
- **Committed in:** Task 1 commit (no separate commit needed for system package)

---

**Total deviations:** 1 auto-fixed (1 blocking)
**Impact on plan:** Go installation was essential to proceed. Version 1.19.8 is older than researched recommendation (1.24+) but adequate for stdlib HTTP server. All code uses syntax compatible with 1.19+.

## Issues Encountered

**Docker image build verification incomplete**

- **Issue:** Corporate proxy (hg-vm-prx-sdc.t.rd.honda.com:8080) blocks Docker Hub access
- **Impact:** Cannot pull golang:1.25-bookworm or debian:bookworm-slim base images
- **Evidence:** `proxyconnect tcp: EOF` errors when Docker attempts registry access
- **Workaround applied:** Verified Go cross-compilation works locally (built amd64 and arm64 binaries successfully at 4.2-4.4MB each)
- **Docker verification status:**
  - ✓ Dockerfile syntax correct and follows multi-stage pattern
  - ✓ Go binary compiles for target platforms
  - ✗ Cannot verify actual image build until proxy/network resolved
  - ✗ Cannot verify image size (<150MB target) until build succeeds
  - ✗ Cannot test container startup or health check endpoint
- **Next step:** Image build will be verified in 01-02 plan (Docker Compose dev environment) once network access is available, or can build directly on Pi where proxy may not apply

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

**Ready for 01-02 (Docker Compose dev environment)** with one caveat:

- **Blocker:** Docker Hub registry access needed to pull base images
- **Alternatives:**
  1. Configure Docker to use corporate proxy correctly
  2. Build on Raspberry Pi directly (may have different network config)
  3. Use local registry mirror if available
  4. Pull images from alternative registry (gcr.io, quay.io)

The foundation code is complete and verified. All Go components compile successfully for both development (x86_64) and production (ARM64) platforms. Container runtime verification deferred to next plan when network access is available.

---
*Phase: 01-foundation*
*Completed: 2026-02-03*