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/rehype-parse/index.d.ts

@@ -0,0 +1,24 @@
+import type {Root} from 'hast'
+import type {Plugin} from 'unified'
+import type {Options} from './lib/index.js'
+
+export type {ErrorCode, ErrorSeverity} from 'hast-util-from-html'
+export type {Options} from './lib/index.js'
+
+/**
+ * Plugin to add support for parsing from HTML.
+ *
+ * @this
+ *   Unified processor.
+ * @param
+ *   Configuration (optional).
+ * @returns
+ *   Nothing.
+ */
+declare const rehypeParse: Plugin<[(Options | null | undefined)?], string, Root>
+export default rehypeParse
+
+// Add custom settings supported when `rehype-parse` is added.
+declare module 'unified' {
+  interface Settings extends Options {}
+}