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/components/prism-hpkp.js

@@ -0,0 +1,14 @@
+/**
+ * Original by Scott Helme.
+ *
+ * Reference: https://scotthelme.co.uk/hpkp-cheat-sheet/
+ */
+
+Prism.languages.hpkp = {
+	'directive': {
+		pattern: /\b(?:includeSubDomains|max-age|pin-sha256|preload|report-to|report-uri|strict)(?=[\s;=]|$)/i,
+		alias: 'property'
+	},
+	'operator': /=/,
+	'punctuation': /;/
+};