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-strikethrough/index.d.ts

@@ -0,0 +1,24 @@
+export {gfmStrikethroughHtml} from './lib/html.js'
+export {gfmStrikethrough} from './lib/syntax.js'
+
+/**
+ * Configuration (optional).
+ */
+export interface Options {
+  /**
+   * Whether to support strikethrough with a single tilde (default: `true`).
+   *
+   * Single tildes work on github.com, but are technically prohibited by the
+   * GFM spec.
+   */
+  singleTilde?: boolean | null | undefined
+}
+
+declare module 'micromark-util-types' {
+  interface TokenTypeMap {
+    strikethroughSequence: 'strikethroughSequence'
+    strikethroughSequenceTemporary: 'strikethroughSequenceTemporary'
+    strikethrough: 'strikethrough'
+    strikethroughText: 'strikethroughText'
+  }
+}