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/decode-named-character-reference/index.js

@@ -0,0 +1,19 @@
+import {characterEntities} from 'character-entities'
+
+// To do: next major: use `Object.hasOwn`.
+const own = {}.hasOwnProperty
+
+/**
+ * Decode a single character reference (without the `&` or `;`).
+ * You probably only need this when you’re building parsers yourself that follow
+ * different rules compared to HTML.
+ * This is optimized to be tiny in browsers.
+ *
+ * @param {string} value
+ *   `notin` (named), `#123` (deci), `#x123` (hexa).
+ * @returns {string|false}
+ *   Decoded reference.
+ */
+export function decodeNamedCharacterReference(value) {
+  return own.call(characterEntities, value) ? characterEntities[value] : false
+}