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/custom-class/prism-custom-class.min.js

@@ -0,0 +1 @@
+!function(){if("undefined"!=typeof Prism){var n,s,a="";Prism.plugins.customClass={add:function(s){n=s},map:function(n){s="function"==typeof n?n:function(s){return n[s]||s}},prefix:function(n){a=n||""},apply:t},Prism.hooks.add("wrap",(function(e){if(n){var u=n({content:e.content,type:e.type,language:e.language});Array.isArray(u)?e.classes.push.apply(e.classes,u):u&&e.classes.push(u)}(s||a)&&(e.classes=e.classes.map((function(n){return t(n,e.language)})))}))}function t(n,t){return a+(s?s(n,t):n)}}();