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/@astrojs/markdown-remark/dist/rehype-shiki.js

@@ -0,0 +1,29 @@
+import { highlightCodeBlocks } from "./highlight.js";
+import { createShikiHighlighter } from "./shiki.js";
+const rehypeShiki = (config, excludeLangs) => {
+  let highlighterAsync;
+  return async (tree) => {
+    highlighterAsync ??= createShikiHighlighter({
+      langs: config?.langs,
+      theme: config?.theme,
+      themes: config?.themes,
+      langAlias: config?.langAlias
+    });
+    const highlighter = await highlighterAsync;
+    await highlightCodeBlocks(
+      tree,
+      (code, language, options) => {
+        return highlighter.codeToHast(code, language, {
+          meta: options?.meta,
+          wrap: config?.wrap,
+          defaultColor: config?.defaultColor,
+          transformers: config?.transformers
+        });
+      },
+      excludeLangs
+    );
+  };
+};
+export {
+  rehypeShiki
+};