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/prismjs/plugins/wpd/prism-wpd.css

@@ -0,0 +1,11 @@
+code[class*="language-"] a[href],
+pre[class*="language-"] a[href] {
+	cursor: help;
+	text-decoration: none;
+}
+
+code[class*="language-"] a[href]:hover,
+pre[class*="language-"] a[href]:hover {
+	cursor: help;
+	text-decoration: underline;
+}