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/vite-plugin-markdown/images.d.ts

@@ -0,0 +1,5 @@
+export type MarkdownImagePath = {
+    raw: string;
+    safeName: string;
+};
+export declare function getMarkdownCodeForImages(localImagePaths: MarkdownImagePath[], remoteImagePaths: string[], html: string): string;