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-diff.min.js

@@ -0,0 +1 @@
+!function(e){e.languages.diff={coord:[/^(?:\*{3}|-{3}|\+{3}).*$/m,/^@@.*@@$/m,/^\d.*$/m]};var n={"deleted-sign":"-","deleted-arrow":"<","inserted-sign":"+","inserted-arrow":">",unchanged:" ",diff:"!"};Object.keys(n).forEach((function(a){var i=n[a],r=[];/^\w+$/.test(a)||r.push(/\w+/.exec(a)[0]),"diff"===a&&r.push("bold"),e.languages.diff[a]={pattern:RegExp("^(?:["+i+"].*(?:\r\n?|\n|(?![\\s\\S])))+","m"),alias:r,inside:{line:{pattern:/(.)(?=[\s\S]).*(?:\r\n?|\n)?/,lookbehind:!0},prefix:{pattern:/[\s\S]/,alias:/\w+/.exec(a)[0]}}}})),Object.defineProperty(e.languages.diff,"PREFIXES",{value:n})}(Prism);