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/preferences/store.d.ts

@@ -0,0 +1,15 @@
+export declare class PreferenceStore {
+    private dir;
+    private file;
+    constructor(dir: string, filename?: string);
+    private _store?;
+    private get store();
+    private set store(value);
+    write(): void;
+    clear(): void;
+    delete(key: string): boolean;
+    get(key: string): any;
+    has(key: string): boolean;
+    set(key: string, value: any): void;
+    getAll(): Record<string, any>;
+}