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/core/polyfill.js

@@ -0,0 +1,17 @@
+import buffer from "node:buffer";
+import crypto from "node:crypto";
+function apply() {
+  if (!globalThis.crypto) {
+    Object.defineProperty(globalThis, "crypto", {
+      value: crypto.webcrypto
+    });
+  }
+  if (!globalThis.File) {
+    Object.defineProperty(globalThis, "File", {
+      value: buffer.File
+    });
+  }
+}
+export {
+  apply
+};