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/micromark-util-subtokenize/index.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Tokenize subcontent.
+ *
+ * @param {Array<Event>} eventsArray
+ *   List of events.
+ * @returns {boolean}
+ *   Whether subtokens were found.
+ */
+export function subtokenize(eventsArray: Array<Event>): boolean;
+export { SpliceBuffer } from "./lib/splice-buffer.js";
+import type { Event } from 'micromark-util-types';
+//# sourceMappingURL=index.d.ts.map