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/util/container-phrasing.d.ts

@@ -0,0 +1,19 @@
+/**
+ * Serialize the children of a parent that contains phrasing children.
+ *
+ * These children will be joined flush together.
+ *
+ * @param {PhrasingParents} parent
+ *   Parent of flow nodes.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @param {Info} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined together.
+ */
+export function containerPhrasing(parent: PhrasingParents, state: State, info: Info): string;
+import type { PhrasingParents } from '../types.js';
+import type { State } from 'mdast-util-to-markdown';
+import type { Info } from 'mdast-util-to-markdown';
+//# sourceMappingURL=container-phrasing.d.ts.map