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/property-information/lib/util/case-sensitive-transform.js

@@ -0,0 +1,11 @@
+/**
+ * @param {Record<string, string>} attributes
+ *   Attributes.
+ * @param {string} attribute
+ *   Attribute.
+ * @returns {string}
+ *   Transformed attribute.
+ */
+export function caseSensitiveTransform(attributes, attribute) {
+  return attribute in attributes ? attributes[attribute] : attribute
+}