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/mdast-util-gfm-footnote/lib/index.d.ts

@@ -0,0 +1,22 @@
+/**
+ * Create an extension for `mdast-util-from-markdown` to enable GFM footnotes
+ * in markdown.
+ *
+ * @returns {FromMarkdownExtension}
+ *   Extension for `mdast-util-from-markdown`.
+ */
+export function gfmFootnoteFromMarkdown(): FromMarkdownExtension;
+/**
+ * Create an extension for `mdast-util-to-markdown` to enable GFM footnotes
+ * in markdown.
+ *
+ * @param {ToMarkdownOptions | null | undefined} [options]
+ *   Configuration (optional).
+ * @returns {ToMarkdownExtension}
+ *   Extension for `mdast-util-to-markdown`.
+ */
+export function gfmFootnoteToMarkdown(options?: ToMarkdownOptions | null | undefined): ToMarkdownExtension;
+import type { Extension as FromMarkdownExtension } from 'mdast-util-from-markdown';
+import type { ToMarkdownOptions } from 'mdast-util-gfm-footnote';
+import type { Options as ToMarkdownExtension } from 'mdast-util-to-markdown';
+//# sourceMappingURL=index.d.ts.map