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/ohash/dist/shared/ohash.CMR0vuBX.d.ts

@@ -0,0 +1,9 @@
+/**
+ * Compare two objects using reference equality and stable deep hashing.
+ * @param {any} object1 First object
+ * @param {any} object2 Second object
+ * @return {boolean} true if equal and false if not
+ */
+declare function isEqual(object1: any, object2: any): boolean;
+
+export { isEqual as i };