docs(01-02): complete Docker Compose dev environment plan

Tasks completed: 2/3 (Task 3 checkpoint approved with deferred verification)
- Task 1: Create Docker Compose development environment
- Task 2: Verify container isolation and health endpoint (deferred)
- Task 3: Human verification checkpoint (approved - skip Docker runtime)

Phase 1 (Foundation) complete.

SUMMARY: .planning/phases/01-foundation/01-02-SUMMARY.md

.planning/phases/01-foundation/01-02-SUMMARY.md

@@ -0,0 +1,136 @@
+---
+phase: 01-foundation
+plan: 02
+subsystem: infra
+tags: [docker-compose, air, hot-reload, dev-environment]
+
+# Dependency graph
+requires:
+  - phase: 01-01
+    provides: Go HTTP server with health check, multi-stage Dockerfile
+provides:
+  - Docker Compose development environment with hot reload
+  - Air configuration for Go file watching
+  - Single-command development startup (docker compose up)
+affects: [02-cli-tool, 03-authentication, future development workflows]
+
+# Tech tracking
+tech-stack:
+  added: [docker-compose, air-hot-reload]
+  patterns: [bind-mount-for-dev, named-volume-for-data, builder-stage-for-toolchain]
+
+key-files:
+  created:
+    - docker-compose.yml
+    - .air.toml
+  modified: []
+
+key-decisions:
+  - "Use builder stage in dev for hot reload (needs Go toolchain)"
+  - "Bind mount workspace for live code editing"
+  - "Named volume for /data persistence across restarts"
+  - "Air watches .go files, excludes tests for faster rebuilds"
+  - "Skip Docker runtime verification due to registry access blocker"
+
+patterns-established:
+  - "docker compose up starts dev environment with single command"
+  - "Air automatically rebuilds on .go file changes with 1s delay"
+  - "Dev environment uses cached bind mount for better performance on WSL/macOS"
+
+# Metrics
+duration: 6min
+completed: 2026-02-03
+---
+
+# Phase 1 Plan 2: Docker Compose Dev Environment Summary
+
+**Docker Compose development environment with Air hot reload configured for single-command startup**
+
+## Performance
+
+- **Duration:** 6 min
+- **Started:** 2026-02-03T09:09:38Z
+- **Completed:** 2026-02-03T09:15:45Z
+- **Tasks:** 2/3 (Task 3 checkpoint approved with deferred verification)
+- **Files modified:** 2
+
+## Accomplishments
+
+- Docker Compose orchestration with backend service, ports, volumes configured
+- Air hot reload configuration watching Go files with appropriate exclusions
+- Valid YAML configurations verified syntactically
+- Cross-compilation verified for both amd64 and arm64 architectures
+- Local server verification confirms endpoints work correctly
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create Docker Compose development environment** - `6cbf414` (feat)
+2. **Task 2: Verify container isolation and health endpoint** - No file changes (verification only)
+3. **Task 3: Human verification checkpoint** - Approved with deferred Docker runtime testing
+
+**Plan metadata:** (will be added in final commit)
+
+## Files Created/Modified
+
+- `docker-compose.yml` - Orchestrates backend service with bind mount and named volume, targets builder stage for dev
+- `.air.toml` - Hot reload configuration for Go with file watching, exclusions, and rebuild settings
+
+## Decisions Made
+
+1. **Builder stage for development**: Using `target: builder` in docker-compose.yml gives access to Go toolchain for Air rebuilds
+2. **Bind mount strategy**: `.:/workspace:cached` provides live editing with performance optimization for WSL2/macOS
+3. **Air exclusions**: Exclude tests, planning docs, and Docker files to avoid unnecessary rebuilds
+4. **Deferred Docker verification**: User approved skipping Docker runtime testing due to registry access blocker - will verify on Pi deployment
+
+## Deviations from Plan
+
+None - plan executed as written. Docker runtime verification was deferred by user approval due to known infrastructure blocker (corporate proxy blocks Docker Hub registry access).
+
+## Issues Encountered
+
+**Docker runtime verification incomplete (same blocker as 01-01)**
+
+- **Issue:** Corporate proxy blocks Docker Hub registry access
+- **Impact:** Cannot pull base images, build containers, or test Docker Compose environment
+- **Evidence:** `proxyconnect tcp: EOF` errors when accessing registry-1.docker.io
+- **What was verified:**
+  - ✓ docker-compose.yml is valid YAML (docker compose config succeeds)
+  - ✓ .air.toml configuration is valid
+  - ✓ Go binary compiles successfully (4.4MB amd64, 4.2MB arm64)
+  - ✓ Server runs locally and serves endpoints correctly
+  - ✓ Root endpoint returns "Pirate Station API"
+  - ✓ Health endpoint returns unhealthy when /data not mounted
+  - ✓ Cross-compilation works for both target architectures
+- **What cannot be verified until network access:**
+  - ✗ Docker image build
+  - ✗ Docker Compose environment startup
+  - ✗ Hot reload functionality inside container
+  - ✗ Container isolation (volume-only access)
+  - ✗ Health endpoint behavior inside container with volume mounted
+- **Resolution:** User approved deferring Docker runtime verification to Pi deployment where network configuration may differ
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+**Phase 1 (Foundation) complete** with configurations ready for development workflow:
+
+- **Code verified:** All Go code compiles and runs correctly on host
+- **Configurations ready:** docker-compose.yml and .air.toml are syntactically valid and follow best practices
+- **Docker runtime testing deferred:** Will be verified when deployed to Raspberry Pi with network access to container registries
+- **Ready for Phase 2:** CLI tool development can proceed - either using `go run` locally or Docker Compose when registry access is available
+
+**Phase 1 deliverables status:**
+- ✓ INFRA-01: Single binary Go backend (verified via cross-compilation)
+- ✓ INFRA-02: Container isolation design (Dockerfile uses non-root user, volume mount pattern)
+- ⏸ Full container verification deferred to Pi deployment environment
+
+The foundation is code-complete and configurations are production-ready. Docker runtime behavior will be validated in the target deployment environment.
+
+---
+*Phase: 01-foundation*
+*Completed: 2026-02-03*