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/css-select/lib/esm/pseudo-selectors/subselects.d.ts

@@ -0,0 +1,9 @@
+import type { Selector } from "css-what";
+import type { CompiledQuery, InternalOptions, CompileToken, Adapter } from "../types.js";
+/** Used as a placeholder for :has. Will be replaced with the actual element. */
+export declare const PLACEHOLDER_ELEMENT: {};
+export declare function ensureIsTag<Node, ElementNode extends Node>(next: CompiledQuery<ElementNode>, adapter: Adapter<Node, ElementNode>): CompiledQuery<Node>;
+export declare type Subselect = <Node, ElementNode extends Node>(next: CompiledQuery<ElementNode>, subselect: Selector[][], options: InternalOptions<Node, ElementNode>, context: Node[] | undefined, compileToken: CompileToken<Node, ElementNode>) => CompiledQuery<ElementNode>;
+export declare function getNextSiblings<Node, ElementNode extends Node>(elem: Node, adapter: Adapter<Node, ElementNode>): ElementNode[];
+export declare const subselects: Record<string, Subselect>;
+//# sourceMappingURL=subselects.d.ts.map