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/astro/dist/vite-plugin-html/transform/slots.js

@@ -0,0 +1,28 @@
+import { visit } from "unist-util-visit";
+import { escapeTemplateLiteralCharacters } from "./utils.js";
+const rehypeSlots = ({ s }) => {
+  return (tree, file) => {
+    visit(tree, (node) => {
+      if (node.type === "element" && node.tagName === "slot") {
+        if (typeof node.properties?.["is:inline"] !== "undefined") return;
+        const name = node.properties?.["name"] ?? "default";
+        const start = node.position?.start.offset ?? 0;
+        const end = node.position?.end.offset ?? 0;
+        const first = node.children.at(0) ?? node;
+        const last = node.children.at(-1) ?? node;
+        const text = file.value.slice(first.position?.start.offset ?? 0, last.position?.end.offset ?? 0).toString();
+        s.overwrite(
+          start,
+          end,
+          `\${${SLOT_PREFIX}["${name}"] ?? \`${escapeTemplateLiteralCharacters(text).trim()}\`}`
+        );
+      }
+    });
+  };
+};
+var slots_default = rehypeSlots;
+const SLOT_PREFIX = `___SLOTS___`;
+export {
+  SLOT_PREFIX,
+  slots_default as default
+};