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/command-line/prism-command-line.min.css

@@ -0,0 +1 @@
+.command-line-prompt{border-right:1px solid #999;display:block;float:left;font-size:100%;letter-spacing:-1px;margin-right:1em;pointer-events:none;text-align:right;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.command-line-prompt>span:before{opacity:.7;content:' ';display:block;padding-right:.8em}.command-line-prompt>span[data-user]:before{content:"[" attr(data-user) "@" attr(data-host) "] $"}.command-line-prompt>span[data-user=root]:before{content:"[" attr(data-user) "@" attr(data-host) "] #"}.command-line-prompt>span[data-prompt]:before{content:attr(data-prompt)}.command-line-prompt>span[data-continuation-prompt]:before{content:attr(data-continuation-prompt)}.command-line span.token.output{opacity:.7}