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/oniguruma-parser/dist/optimizer/transforms/alternation-to-class.d.ts

@@ -0,0 +1,7 @@
+import type { Visitor } from '../../traverser/traverse.js';
+/**
+Use character classes for adjacent alternatives with single-length values.
+*/
+declare const alternationToClass: Visitor;
+export { alternationToClass, };
+//# sourceMappingURL=alternation-to-class.d.ts.map