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/prismjs/components/prism-go-module.min.js

@@ -0,0 +1 @@
+Prism.languages["go-mod"]=Prism.languages["go-module"]={comment:{pattern:/\/\/.*/,greedy:!0},version:{pattern:/(^|[\s()[\],])v\d+\.\d+\.\d+(?:[+-][-+.\w]*)?(?![^\s()[\],])/,lookbehind:!0,alias:"number"},"go-version":{pattern:/((?:^|\s)go\s+)\d+(?:\.\d+){1,2}/,lookbehind:!0,alias:"number"},keyword:{pattern:/^([ \t]*)(?:exclude|go|module|replace|require|retract)\b/m,lookbehind:!0},operator:/=>/,punctuation:/[()[\],]/};