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/check-bullet-ordered.js

@@ -0,0 +1,21 @@
+/**
+ * @import {Options, State} from 'mdast-util-to-markdown'
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bulletOrdered'], null | undefined>}
+ */
+export function checkBulletOrdered(state) {
+  const marker = state.options.bulletOrdered || '.'
+
+  if (marker !== '.' && marker !== ')') {
+    throw new Error(
+      'Cannot serialize items with `' +
+        marker +
+        '` for `options.bulletOrdered`, expected `.` or `)`'
+    )
+  }
+
+  return marker
+}