fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/property-information/lib/xlink.js

@@ -0,0 +1,17 @@
+import {create} from './util/create.js'
+
+export const xlink = create({
+  properties: {
+    xLinkActuate: null,
+    xLinkArcRole: null,
+    xLinkHref: null,
+    xLinkRole: null,
+    xLinkShow: null,
+    xLinkTitle: null,
+    xLinkType: null
+  },
+  space: 'xlink',
+  transform(_, property) {
+    return 'xlink:' + property.slice(5).toLowerCase()
+  }
+})