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/ajv/lib/runtime/validation_error.ts

@@ -0,0 +1,13 @@
+import type {ErrorObject} from "../types"
+
+export default class ValidationError extends Error {
+  readonly errors: Partial<ErrorObject>[]
+  readonly ajv: true
+  readonly validation: true
+
+  constructor(errors: Partial<ErrorObject>[]) {
+    super("validation failed")
+    this.errors = errors
+    this.ajv = this.validation = true
+  }
+}