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/hast-util-from-html/lib/index.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Turn serialized HTML into a hast tree.
+ *
+ * @param {VFile | Value} value
+ *   Serialized HTML to parse.
+ * @param {Readonly<Options> | null | undefined} [options]
+ *   Configuration (optional).
+ * @returns {Root}
+ *   Tree.
+ */
+export function fromHtml(value: VFile | Value, options?: Readonly<Options> | null | undefined): Root;
+import { VFile } from 'vfile';
+import type { Value } from 'vfile';
+import type { Options } from './types.js';
+import type { Root } from 'hast';
+//# sourceMappingURL=index.d.ts.map