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/astro/dist/core/index.d.ts

@@ -0,0 +1,11 @@
+import type { AstroInlineConfig } from '../types/public/config.js';
+export { default as build } from './build/index.js';
+export { default as dev } from './dev/index.js';
+export { default as preview } from './preview/index.js';
+/**
+ * Generates TypeScript types for all Astro modules. This sets up a `src/env.d.ts` file for type inferencing,
+ * and defines the `astro:content` module for the Content Collections API.
+ *
+ * @experimental The JavaScript API is experimental
+ */
+export declare const sync: (inlineConfig: AstroInlineConfig) => Promise<void>;