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/micromark-extension-gfm-task-list-item/lib/html.js

@@ -0,0 +1,29 @@
+/**
+ * @import {HtmlExtension} from 'micromark-util-types'
+ */
+
+/**
+ * Create an HTML extension for `micromark` to support GFM task list items when
+ * serializing to HTML.
+ *
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions` to
+ *   support GFM task list items when serializing to HTML.
+ */
+export function gfmTaskListItemHtml() {
+  return {
+    enter: {
+      taskListCheck() {
+        this.tag('<input type="checkbox" disabled="" ');
+      }
+    },
+    exit: {
+      taskListCheck() {
+        this.tag('/>');
+      },
+      taskListCheckValueChecked() {
+        this.tag('checked="" ');
+      }
+    }
+  };
+}