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/unescaped-markup/prism-unescaped-markup.css

@@ -0,0 +1,10 @@
+/* Fallback, in case JS does not run, to ensure the code is at least visible */
+[class*='lang-'] script[type='text/plain'],
+[class*='language-'] script[type='text/plain'],
+script[type='text/plain'][class*='lang-'],
+script[type='text/plain'][class*='language-'] {
+	display: block;
+	font: 100% Consolas, Monaco, monospace;
+	white-space: pre;
+	overflow: auto;
+}