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/astro/dist/cli/exec.d.ts

@@ -0,0 +1,6 @@
+import { type Options } from 'tinyexec';
+/**
+ * Improve tinyexec error logging and set `throwOnError` to `true` by default
+ * @deprecated use CommandExecutor instead
+ */
+export declare function exec(command: string, args?: string[], options?: Partial<Options>): PromiseLike<import("tinyexec").Output>;