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/unicode.d.ts

@@ -0,0 +1,8 @@
+import type { UnicodePropertyMap } from "./parser/parse.js";
+/**
+All Unicode properties supported by Oniguruma 6.9.10 (Unicode 16.0.0).
+Copied from <github.com/kkos/oniguruma/blob/master/doc/UNICODE_PROPERTIES>
+*/
+declare const OnigUnicodePropertyMap: UnicodePropertyMap;
+export { OnigUnicodePropertyMap, };
+//# sourceMappingURL=unicode.d.ts.map