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/cli/info/infra/prompts-prompt.d.ts

@@ -0,0 +1,11 @@
+import type { Prompt } from '../definitions.js';
+export declare class PromptsPrompt implements Prompt {
+    #private;
+    constructor({ force }: {
+        force: boolean;
+    });
+    confirm({ message, defaultValue, }: {
+        message: string;
+        defaultValue?: boolean;
+    }): Promise<boolean>;
+}