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/astro/dist/env/config.js

@@ -0,0 +1,21 @@
+const envField = {
+  string: (options) => ({
+    ...options,
+    type: "string"
+  }),
+  number: (options) => ({
+    ...options,
+    type: "number"
+  }),
+  boolean: (options) => ({
+    ...options,
+    type: "boolean"
+  }),
+  enum: (options) => ({
+    ...options,
+    type: "enum"
+  })
+};
+export {
+  envField
+};