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/runtime/client/visible.prebuilt.d.ts

@@ -0,0 +1,7 @@
+/**
+ * This file is prebuilt from packages/astro/src/runtime/client/visible.ts
+ * Do not edit this directly, but instead edit that file and rerun the prebuild
+ * to generate this file.
+ */
+declare const _default: "(()=>{var a=(s,i,o)=>{let r=async()=>{await(await s())()},t=typeof i.value==\"object\"?i.value:void 0,c={rootMargin:t==null?void 0:t.rootMargin},n=new IntersectionObserver(e=>{for(let l of e)if(l.isIntersecting){n.disconnect(),r();break}},c);for(let e of o.children)n.observe(e)};(self.Astro||(self.Astro={})).visible=a;window.dispatchEvent(new Event(\"astro:visible\"));})();";
+export default _default;