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/stringify-entities/lib/constant/dangerous.d.ts

@@ -0,0 +1,7 @@
+/**
+ * List of legacy (that don’t need a trailing `;`) named references which could,
+ * depending on what follows them, turn into a different meaning
+ *
+ * @type {Array<string>}
+ */
+export const dangerous: Array<string>;