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/unist-util-modify-children/lib/index.d.ts

@@ -0,0 +1,30 @@
+/**
+ * Wrap `modifier` to be called for each child in the nodes later given to
+ * `modify`.
+ *
+ * @template {Parent} Kind
+ *   Node type.
+ * @param {Modifier<Kind>} modifier
+ *   Callback called for each `child` in `parent` later given to `modify`.
+ * @returns {Modify<Kind>}
+ *   Modify children of `parent`.
+ */
+export function modifyChildren<Kind extends import('unist').Parent>(
+  modifier: Modifier<Kind>
+): Modify<Kind>
+export type Node = import('unist').Node
+export type Parent = import('unist').Parent
+/**
+ * Callback called for each `child` in `parent` later given to `modify`.
+ */
+export type Modifier<Kind extends import('unist').Parent> = (
+  child: Kind['children'][number],
+  index: number,
+  parent: Kind
+) => number | undefined | void
+/**
+ * Modify children of `parent`.
+ */
+export type Modify<Kind extends import('unist').Parent> = (
+  parent: Kind
+) => undefined