Add local product detail page with Dutchie comparison

- Add ProductDetail page for viewing products locally
- Add Dutchie and Details buttons to product cards in Products and StoreDetail pages
- Add Last Updated display showing data freshness
- Add parallel scrape scripts and routes
- Add K8s deployment configurations
- Add frontend Dockerfile with nginx

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

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

backend/package.json

@@ -29,7 +29,7 @@
     "puppeteer": "^21.0.0",
     "puppeteer-extra": "^3.3.6",
     "puppeteer-extra-plugin-stealth": "^2.11.2",
-    "sharp": "^0.34.5",
+    "sharp": "^0.32.0",
     "socks-proxy-agent": "^8.0.2",
     "uuid": "^9.0.1",
     "zod": "^3.22.4"
@@ -41,6 +41,7 @@
     "@types/jsonwebtoken": "^9.0.5",
     "@types/node": "^20.10.5",
     "@types/node-cron": "^3.0.11",
+    "@types/pg": "^8.15.6",
     "@types/uuid": "^9.0.7",
     "tsx": "^4.7.0",
     "typescript": "^5.3.3"