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/mdast-util-to-string/lib/index.d.ts

@@ -0,0 +1,31 @@
+/**
+ * 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 {unknown} [value]
+ *   Thing to serialize, typically `Node`.
+ * @param {Options | null | undefined} [options]
+ *   Configuration (optional).
+ * @returns {string}
+ *   Serialized `value`.
+ */
+export function toString(
+  value?: unknown,
+  options?: Options | null | undefined
+): string
+export type Nodes = import('mdast').Nodes
+/**
+ * Configuration (optional).
+ */
+export type Options = {
+  /**
+   * Whether to use `alt` for `image`s (default: `true`).
+   */
+  includeImageAlt?: boolean | null | undefined
+  /**
+   * Whether to use `value` of HTML (default: `true`).
+   */
+  includeHtml?: boolean | null | undefined
+}