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/defu/lib/defu.cjs

@@ -0,0 +1,11 @@
+const { defu, createDefu, defuFn, defuArrayFn } = require('../dist/defu.cjs');
+
+module.exports = defu;
+
+module.exports.defu = defu;
+module.exports.default = defu;
+
+module.exports.createDefu = createDefu;
+module.exports.defuFn = defuFn;
+module.exports.defuArrayFn = defuArrayFn;
+