fix: use curl consistently for healthcheck in Dockerfile and docker-compose.yml

- Replace wget with curl in root Dockerfile healthcheck command (line 50)
- Add curl to apk dependencies in root Dockerfile (line 22)
- Align healthcheck parameters between Dockerfile and docker-compose.yml
- Mark task 6.8 as complete

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -18,8 +18,8 @@ FROM node:20-alpine
 
 WORKDIR /app
 
-# Install PostgreSQL client for pg module
-RUN apk add --no-cache postgresql-client
+# Install PostgreSQL client and curl for healthcheck
+RUN apk add --no-cache postgresql-client curl
 
 RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
 
@@ -47,6 +47,6 @@ USER nextjs
 
 EXPOSE 3000
 
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 CMD wget --no-verbose --tries=1 --spider http://localhost:3000/api/health || exit 1
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 CMD curl -f http://localhost:3000/api/health
 
 CMD ["/app/scripts/startup.sh"]

openspec/changes/code-review-fix/tasks.md

@@ -59,7 +59,7 @@
 - [x] 6.5 `[sonnet]` Add SHA256 checksum verification for TA-Lib download in `services/ml/Dockerfile`
 - [x] 6.6 `[haiku]` Remove `COPY --from=builder /app/node_modules ./node_modules` line from `Dockerfile:29` (standalone doesn't need it)
 - [x] 6.7 `[sonnet]` Pin Docker base images to `@sha256:` digests in both Dockerfiles
-- [ ] 6.8 `[haiku]` Fix healthcheck tool mismatch: use same tool (curl) in Dockerfile and docker-compose.yml
+- [x] 6.8 `[haiku]` Fix healthcheck tool mismatch: use same tool (curl) in Dockerfile and docker-compose.yml
 
 ## 7. Frontend — Stale Closures & Race Conditions