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-inside-container/readme.md

@@ -0,0 +1,36 @@
+# is-inside-container
+
+> Check if the process is running inside a container
+
+## Install
+
+```sh
+npm install is-inside-container
+```
+
+## Usage
+
+```js
+import isInsideContainer from 'is-inside-container';
+
+if (isInsideContainer()) {
+	console.log('Running inside a container');
+}
+```
+
+## CLI
+
+```sh
+is-inside-container
+```
+
+Exits with code 0 if inside a container and 2 if not.
+
+## Supported containers
+
+- Docker
+- Podman
+
+## Related
+
+- [is-docker](https://github.com/sindresorhus/is-docker) - Check if the process is running inside a Docker container