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/micromark/lib/initialize/document.d.ts

@@ -0,0 +1,10 @@
+/** @type {InitialConstruct} */
+export const document: InitialConstruct;
+/**
+ * Construct and its state.
+ */
+export type StackItem = [Construct, ContainerState];
+import type { InitialConstruct } from 'micromark-util-types';
+import type { Construct } from 'micromark-util-types';
+import type { ContainerState } from 'micromark-util-types';
+//# sourceMappingURL=document.d.ts.map