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/web-namespaces/index.js

@@ -0,0 +1,13 @@
+/**
+ * Map of web namespaces.
+ *
+ * @type {Record<string, string>}
+ */
+export const webNamespaces = {
+  html: 'http://www.w3.org/1999/xhtml',
+  mathml: 'http://www.w3.org/1998/Math/MathML',
+  svg: 'http://www.w3.org/2000/svg',
+  xlink: 'http://www.w3.org/1999/xlink',
+  xml: 'http://www.w3.org/XML/1998/namespace',
+  xmlns: 'http://www.w3.org/2000/xmlns/'
+}