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/readme.md

@@ -0,0 +1,55 @@
+# is-port-reachable
+
+> Check if a local or remote port is reachable
+
+## Install
+
+```sh
+npm install is-port-reachable
+```
+
+## Usage
+
+```js
+import isPortReachable from 'is-port-reachable';
+
+console.log(await isPortReachable(80, {host: 'google.com'}));
+//=> true
+```
+
+## API
+
+### isPortReachable(options)
+
+Returns `Promise<boolean>` for whether the port is reachable.
+
+##### port
+
+Type: `number`
+
+The port to check.
+
+#### options
+
+Type: `object`
+
+##### host
+
+**Required**\
+Type: `string`\
+Example: `'localhost'`
+
+The host to check.
+
+Can be a domain (optionally, with a sub-domain) or an IP address.
+
+##### timeout
+
+Type: `number`\
+Default: `1000`
+
+The time to wait in milliseconds before giving up.
+
+## Related
+
+- [is-reachable](https://github.com/sindresorhus/is-reachable/) - Check if servers are reachable