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/is-port-reachable/index.d.ts

@@ -0,0 +1,30 @@
+export interface Options {
+	/**
+	The host to check.
+
+	Can be a domain (optionally, with a sub-domain) or an IP address.
+
+	@example 'localhost'
+	*/
+	readonly host: string;
+
+	/**
+	The time to wait in milliseconds before giving up.
+
+	@default 1000
+	*/
+	readonly timeout?: number;
+}
+
+/**
+Check if a local or remote port is reachable.
+
+@example
+```
+import isPortReachable from 'is-port-reachable';
+
+console.log(await isPortReachable(80, {host: 'google.com'}));
+//=> true
+```
+*/
+export default function isPortReachable(port: number, options: Options): Promise<boolean>;