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/vfile/lib/minproc.browser.js

@@ -0,0 +1,8 @@
+// Somewhat based on:
+// <https://github.com/defunctzombie/node-process/blob/master/browser.js>.
+// But I don’t think one tiny line of code can be copyrighted. 😅
+export const minproc = {cwd}
+
+function cwd() {
+  return '/'
+}