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/runtime/client/media.js

@@ -0,0 +1,18 @@
+const mediaDirective = (load, options) => {
+  const cb = async () => {
+    const hydrate = await load();
+    await hydrate();
+  };
+  if (options.value) {
+    const mql = matchMedia(options.value);
+    if (mql.matches) {
+      cb();
+    } else {
+      mql.addEventListener("change", cb, { once: true });
+    }
+  }
+};
+var media_default = mediaDirective;
+export {
+  media_default as default
+};