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/micromark/dev/lib/parse.d.ts

@@ -0,0 +1,10 @@
+/**
+ * @param {ParseOptions | null | undefined} [options]
+ *   Configuration (optional).
+ * @returns {ParseContext}
+ *   Parser.
+ */
+export function parse(options?: ParseOptions | null | undefined): ParseContext;
+import type { ParseOptions } from 'micromark-util-types';
+import type { ParseContext } from 'micromark-util-types';
+//# sourceMappingURL=parse.d.ts.map