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/arch/browser.js

@@ -0,0 +1,43 @@
+module.exports = function arch () {
+  /**
+   * User agent strings that indicate a 64-bit OS.
+   * See: http://stackoverflow.com/a/13709431/292185
+   */
+  var userAgent = navigator.userAgent
+  if ([
+    'x86_64',
+    'x86-64',
+    'Win64',
+    'x64;',
+    'amd64',
+    'AMD64',
+    'WOW64',
+    'x64_64'
+  ].some(function (str) {
+    return userAgent.indexOf(str) > -1
+  })) {
+    return 'x64'
+  }
+
+  /**
+   * Platform strings that indicate a 64-bit OS.
+   * See: http://stackoverflow.com/a/19883965/292185
+   */
+  var platform = navigator.platform
+  if (platform === 'MacIntel' || platform === 'Linux x86_64') {
+    return 'x64'
+  }
+
+  /**
+   * CPU class strings that indicate a 64-bit OS.
+   * See: http://stackoverflow.com/a/6267019/292185
+   */
+  if (navigator.cpuClass === 'x64') {
+    return 'x64'
+  }
+
+  /**
+   * If none of the above, assume the architecture is 32-bit.
+   */
+  return 'x86'
+}