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-gfm/index.d.ts

@@ -0,0 +1,12 @@
+import type {ToMarkdownOptions as FootnoteOptions} from 'mdast-util-gfm-footnote'
+import type {Options as TableOptions} from 'mdast-util-gfm-table'
+
+/**
+ * Configuration for `gfmToMarkdown` from `mdast-util-gfm`.
+ *
+ * Currently supports options for `mdast-util-gfm-footnote` and
+ * `mdast-util-gfm-table`.
+ */
+export interface Options extends FootnoteOptions, TableOptions {}
+
+export {gfmFromMarkdown, gfmToMarkdown} from './lib/index.js'