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/hast-util-to-html/lib/handle/raw.js

@@ -0,0 +1,27 @@
+/**
+ * @import {Parents} from 'hast'
+ * @import {Raw} from 'mdast-util-to-hast'
+ * @import {State} from '../index.js'
+ */
+
+import {text} from './text.js'
+
+/**
+ * Serialize a raw node.
+ *
+ * @param {Raw} node
+ *   Node to handle.
+ * @param {number | undefined} index
+ *   Index of `node` in `parent.
+ * @param {Parents | undefined} parent
+ *   Parent of `node`.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @returns {string}
+ *   Serialized node.
+ */
+export function raw(node, index, parent, state) {
+  return state.settings.allowDangerousHtml
+    ? node.value
+    : text(node, index, parent, state)
+}