fix: use curl instead of wget for Docker health check

Replaced wget with curl in HEALTHCHECK instruction:
- Install curl in nginx:alpine image (apk add --no-cache curl)
- Changed health check from wget to curl -f
- curl -f fails silently on HTTP errors (simpler than wget flags)
- More commonly available and standard for health checks

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Dockerfile

@@ -33,6 +33,9 @@ RUN pnpm build
 # Stage 3: Runner (serve static files)
 FROM nginx:alpine AS runner
 
+# Install curl for health check
+RUN apk add --no-cache curl
+
 # Copy custom nginx config
 COPY --from=builder /app/nginx.conf /etc/nginx/nginx.conf
 
@@ -44,7 +47,7 @@ EXPOSE 80
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD wget --no-verbose --tries=1 --spider http://localhost/ || exit 1
+  CMD curl -f http://localhost/ || exit 1
 
 # Start nginx
 CMD ["nginx", "-g", "daemon off;"]