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/unist-util-remove-position/lib/index.d.ts

@@ -0,0 +1,26 @@
+/**
+ * Remove the `position` field from a tree.
+ *
+ * @param {Node} tree
+ *   Tree to clean.
+ * @param {Options | null | undefined} [options={force: false}]
+ *   Configuration (default: `{force: false}`).
+ * @returns {undefined}
+ *   Nothing.
+ */
+export function removePosition(
+  tree: Node,
+  options?: Options | null | undefined
+): undefined
+export type Node = import('unist').Node
+/**
+ * Configuration.
+ */
+export type Options = {
+  /**
+   * Whether to use `delete` to remove `position` fields.
+   *
+   * The default is to set them to `undefined`.
+   */
+  force?: boolean | null | undefined
+}

node_modules/unist-util-remove-position/lib/index.js

@@ -0,0 +1,42 @@
+/**
+ * @typedef {import('unist').Node} Node
+ */
+
+/**
+ * @typedef Options
+ *   Configuration.
+ * @property {boolean | null | undefined} [force=false]
+ *   Whether to use `delete` to remove `position` fields.
+ *
+ *   The default is to set them to `undefined`.
+ */
+
+import {visit} from 'unist-util-visit'
+
+/**
+ * Remove the `position` field from a tree.
+ *
+ * @param {Node} tree
+ *   Tree to clean.
+ * @param {Options | null | undefined} [options={force: false}]
+ *   Configuration (default: `{force: false}`).
+ * @returns {undefined}
+ *   Nothing.
+ */
+export function removePosition(tree, options) {
+  const config = options || {}
+  const force = config.force || false
+
+  visit(tree, remove)
+
+  /**
+   * @param {Node} node
+   */
+  function remove(node) {
+    if (force) {
+      delete node.position
+    } else {
+      node.position = undefined
+    }
+  }
+}