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/retext-stringify/index.d.ts

@@ -0,0 +1,14 @@
+import type {Root} from 'nlcst'
+import type {Plugin} from 'unified'
+
+/**
+ * Add support for serializing natural language.
+ *
+ * @this
+ *   Unified processor.
+ * @returns
+ *   Nothing.
+ */
+declare const retextStringify: Plugin<[], Root, string>
+
+export default retextStringify