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/detect-libc/lib/filesystem.js

@@ -0,0 +1,41 @@
+// Copyright 2017 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+const fs = require('fs');
+
+/**
+ * The path where we can find the ldd
+ */
+const LDD_PATH = '/usr/bin/ldd';
+
+/**
+ * Read the content of a file synchronous
+ *
+ * @param {string} path
+ * @returns {string}
+ */
+const readFileSync = (path) => fs.readFileSync(path, 'utf-8');
+
+/**
+ * Read the content of a file
+ *
+ * @param {string} path
+ * @returns {Promise<string>}
+ */
+const readFile = (path) => new Promise((resolve, reject) => {
+  fs.readFile(path, 'utf-8', (err, data) => {
+    if (err) {
+      reject(err);
+    } else {
+      resolve(data);
+    }
+  });
+});
+
+module.exports = {
+  LDD_PATH,
+  readFileSync,
+  readFile
+};