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/cross-fetch/dist/react-native-ponyfill.js

@@ -0,0 +1,6 @@
+module.exports = global.fetch // To enable: import fetch from 'cross-fetch'
+module.exports.default = global.fetch // For TypeScript consumers without esModuleInterop.
+module.exports.fetch = global.fetch // To enable: import {fetch} from 'cross-fetch'
+module.exports.Headers = global.Headers
+module.exports.Request = global.Request
+module.exports.Response = global.Response