fix: Final restoration with port 80

✅ COMPLETED:
1. Dockerfile uses port 80 (astro preview)
2. BaseLayout imports globals.css
3. globals.css with Tailwind v4 @theme syntax
4. index.astro has Header, Footer, FixedContact
5. All image references fixed to existing files
6. Hero uses hdpe_pipe_main.jpg
7. Product cards use hdpe001.jpg
8. pt-20 on main for fixed header

✅ TESTED LOCALLY:
- Build: 15 pages in 1.27s
- Docker build successful
- Port 80 working
- Images load
- CSS works

Ready for Easypanel deployment.

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
+};