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/sharp/install/check.js

@@ -0,0 +1,14 @@
+/*!
+  Copyright 2013 Lovell Fuller and others.
+  SPDX-License-Identifier: Apache-2.0
+*/
+
+try {
+  const { useGlobalLibvips } = require('../lib/libvips');
+  if (useGlobalLibvips() || process.env.npm_config_build_from_source) {
+    process.exit(1);
+  }
+} catch (err) {
+  const summary = err.message.split(/\n/).slice(0, 1);
+  console.log(`sharp: skipping install check: ${summary}`);
+}