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/p-queue/dist/queue.d.ts

@@ -0,0 +1,8 @@
+export type RunFunction = () => Promise<unknown>;
+export type Queue<Element, Options> = {
+    size: number;
+    filter: (options: Readonly<Partial<Options>>) => Element[];
+    dequeue: () => Element | undefined;
+    enqueue: (run: Element, options?: Partial<Options>) => void;
+    setPriority: (id: string, priority: number) => void;
+};