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/util/format-smart.d.ts

@@ -0,0 +1,32 @@
+/**
+ * Configurable ways to encode a character yielding pretty or small results.
+ *
+ * @param {number} code
+ * @param {number} next
+ * @param {FormatSmartOptions} options
+ * @returns {string}
+ */
+export function formatSmart(code: number, next: number, options: FormatSmartOptions): string;
+export type FormatSmartOptions = {
+    /**
+     * Prefer named character references (`&`) where possible.
+     */
+    useNamedReferences?: boolean;
+    /**
+     * Prefer the shortest possible reference, if that results in less bytes.
+     * **Note**: `useNamedReferences` can be omitted when using `useShortestReferences`.
+     */
+    useShortestReferences?: boolean;
+    /**
+     * Whether to omit semicolons when possible.
+     * **Note**: This creates what HTML calls “parse errors” but is otherwise still valid HTML — don’t use this except when building a minifier.
+     * Omitting semicolons is possible for certain named and numeric references in some cases.
+     */
+    omitOptionalSemicolons?: boolean;
+    /**
+     * Create character references which don’t fail in attributes.
+     * **Note**: `attribute` only applies when operating dangerously with
+     * `omitOptionalSemicolons: true`.
+     */
+    attribute?: boolean;
+};