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/diff/libesm/patch/parse.d.ts

@@ -0,0 +1,8 @@
+import type { StructuredPatch } from '../types.js';
+/**
+ * Parses a patch into structured data, in the same structure returned by `structuredPatch`.
+ *
+ * @return a JSON object representation of the a patch, suitable for use with the `applyPatch` method.
+ */
+export declare function parsePatch(uniDiff: string): StructuredPatch[];
+//# sourceMappingURL=parse.d.ts.map