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/assets/utils/getAssetsPrefix.js

@@ -0,0 +1,15 @@
+function getAssetsPrefix(fileExtension, assetsPrefix) {
+  let prefix = "";
+  if (!assetsPrefix) {
+    prefix = "";
+  } else if (typeof assetsPrefix === "string") {
+    prefix = assetsPrefix;
+  } else {
+    const dotLessFileExtension = fileExtension.slice(1);
+    prefix = assetsPrefix[dotLessFileExtension] || assetsPrefix.fallback;
+  }
+  return prefix;
+}
+export {
+  getAssetsPrefix
+};