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/mdast-util-to-markdown/lib/handle/inline-code.d.ts

@@ -0,0 +1,19 @@
+/**
+ * @param {InlineCode} node
+ * @param {Parents | undefined} _
+ * @param {State} state
+ * @returns {string}
+ */
+export function inlineCode(node: InlineCode, _: Parents | undefined, state: State): string;
+export namespace inlineCode {
+    export { inlineCodePeek as peek };
+}
+import type { InlineCode } from 'mdast';
+import type { Parents } from 'mdast';
+import type { State } from 'mdast-util-to-markdown';
+/**
+ * @returns {string}
+ */
+declare function inlineCodePeek(): string;
+export {};
+//# sourceMappingURL=inline-code.d.ts.map