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/merge-stream/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "merge-stream",
+  "version": "2.0.0",
+  "description": "Create a stream that emits events from multiple other streams",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "istanbul cover test.js && istanbul check-cover --statements 100 --branches 100"
+  },
+  "repository": "grncdr/merge-stream",
+  "author": "Stephen Sugden <me@stephensugden.com>",
+  "license": "MIT",
+  "dependencies": {},
+  "devDependencies": {
+    "from2": "^2.0.3",
+    "istanbul": "^0.4.5"
+  }
+}