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/errors.js

@@ -0,0 +1,16 @@
+function invalidVariablesToError(invalid) {
+  const _errors = [];
+  for (const { key, type, errors } of invalid) {
+    if (errors[0] === "missing") {
+      _errors.push(`${key} is missing`);
+    } else if (errors[0] === "type") {
+      _errors.push(`${key}'s type is invalid, expected: ${type}`);
+    } else {
+      _errors.push(`The following constraints for ${key} are not met: ${errors.join(", ")}`);
+    }
+  }
+  return _errors;
+}
+export {
+  invalidVariablesToError
+};