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/compile/ref_error.ts

@@ -0,0 +1,13 @@
+import {resolveUrl, normalizeId, getFullPath} from "./resolve"
+import type {UriResolver} from "../types"
+
+export default class MissingRefError extends Error {
+  readonly missingRef: string
+  readonly missingSchema: string
+
+  constructor(resolver: UriResolver, baseId: string, ref: string, msg?: string) {
+    super(msg || `can't resolve reference ${ref} from id ${baseId}`)
+    this.missingRef = resolveUrl(resolver, baseId, ref)
+    this.missingSchema = normalizeId(getFullPath(resolver, this.missingRef))
+  }
+}