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-definitions/lib/index.d.ts

@@ -0,0 +1,20 @@
+/**
+ * Find definitions in `tree`.
+ *
+ * Uses CommonMark precedence, which means that earlier definitions are
+ * preferred over duplicate later definitions.
+ *
+ * @param {Nodes} tree
+ *   Tree to check.
+ * @returns {GetDefinition}
+ *   Getter.
+ */
+export function definitions(tree: Nodes): GetDefinition
+export type Definition = import('mdast').Definition
+export type Nodes = import('mdast').Nodes
+/**
+ * Get a definition by identifier.
+ */
+export type GetDefinition = (
+  identifier?: string | null | undefined
+) => Definition | undefined