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/nlcst-to-string/lib/index.d.ts

@@ -0,0 +1,13 @@
+/**
+ * Get the text content of a node or list of nodes.
+ *
+ * Prefers the node’s plain-text fields, otherwise serializes its children, and
+ * if the given value is an array, serialize the nodes in it.
+ *
+ * @param {Array<Nodes> | Nodes} value
+ *   Node or list of nodes to serialize.
+ * @returns {string}
+ *   Result.
+ */
+export function toString(value: Array<Nodes> | Nodes): string;
+export type Nodes = import('nlcst').Nodes;