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/parse-latin/lib/plugin/make-final-white-space-siblings.js

@@ -0,0 +1,33 @@
+/**
+ * @typedef {import('nlcst').Paragraph} Paragraph
+ * @typedef {import('nlcst').Root} Root
+ */
+
+import {modifyChildren} from 'unist-util-modify-children'
+
+// Move white space ending a paragraph up, so they are the siblings of
+// paragraphs.
+export const makeFinalWhiteSpaceSiblings = modifyChildren(
+  /**
+   * @type {import('unist-util-modify-children').Modifier<Paragraph | Root>}
+   */
+
+  function (child, index, parent) {
+    if ('children' in child) {
+      const tail = child.children[child.children.length - 1]
+
+      if (tail && tail.type === 'WhiteSpaceNode') {
+        child.children.pop() // Remove `tail`.
+        parent.children.splice(index + 1, 0, tail)
+        const previous = child.children[child.children.length - 1]
+
+        if (previous && previous.position && child.position) {
+          child.position.end = previous.position.end
+        }
+
+        // Next, iterate over the current node again.
+        return index
+      }
+    }
+  }
+)