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/crypto/node/index.d.mts

@@ -0,0 +1,10 @@
+/**
+ * Hashes a string using the SHA-256 algorithm and encodes it in Base64URL format.
+ *
+ * @param {string} data - data message to hash.
+ *
+ * @returns {string} The hash of the data.
+ */
+declare function digest(data: string): string;
+
+export { digest };