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/assets/services/sharp.d.ts

@@ -0,0 +1,14 @@
+import type { ResizeOptions, SharpOptions } from 'sharp';
+import { type LocalImageService } from './service.js';
+export interface SharpImageServiceConfig {
+    /**
+     * The `limitInputPixels` option passed to Sharp. See https://sharp.pixelplumbing.com/api-constructor for more information
+     */
+    limitInputPixels?: SharpOptions['limitInputPixels'];
+    /**
+     * The `kernel` option is passed to resize calls. See https://sharp.pixelplumbing.com/api-resize/ for more information
+     */
+    kernel?: ResizeOptions['kernel'];
+}
+declare const sharpService: LocalImageService<SharpImageServiceConfig>;
+export default sharpService;