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/property-information/lib/util/merge.js

@@ -0,0 +1,27 @@
+/**
+ * @import {Info, Space} from 'property-information'
+ */
+
+import {Schema} from './schema.js'
+
+/**
+ * @param {ReadonlyArray<Schema>} definitions
+ *   Definitions.
+ * @param {Space | undefined} [space]
+ *   Space.
+ * @returns {Schema}
+ *   Schema.
+ */
+export function merge(definitions, space) {
+  /** @type {Record<string, Info>} */
+  const property = {}
+  /** @type {Record<string, string>} */
+  const normal = {}
+
+  for (const definition of definitions) {
+    Object.assign(property, definition.property)
+    Object.assign(normal, definition.normal)
+  }
+
+  return new Schema(property, normal, space)
+}