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-util-decode-string/index.js

@@ -0,0 +1,45 @@
+import { decodeNamedCharacterReference } from 'decode-named-character-reference';
+import { decodeNumericCharacterReference } from 'micromark-util-decode-numeric-character-reference';
+const characterEscapeOrReference = /\\([!-/:-@[-`{-~])|&(#(?:\d{1,7}|x[\da-f]{1,6})|[\da-z]{1,31});/gi;
+
+/**
+ * Decode markdown strings (which occur in places such as fenced code info
+ * strings, destinations, labels, and titles).
+ *
+ * The “string” content type allows character escapes and -references.
+ * This decodes those.
+ *
+ * @param {string} value
+ *   Value to decode.
+ * @returns {string}
+ *   Decoded value.
+ */
+export function decodeString(value) {
+  return value.replace(characterEscapeOrReference, decode);
+}
+
+/**
+ * @param {string} $0
+ *   Match.
+ * @param {string} $1
+ *   Character escape.
+ * @param {string} $2
+ *   Character reference.
+ * @returns {string}
+ *   Decoded value
+ */
+function decode($0, $1, $2) {
+  if ($1) {
+    // Escape.
+    return $1;
+  }
+
+  // Reference.
+  const head = $2.charCodeAt(0);
+  if (head === 35) {
+    const head = $2.charCodeAt(1);
+    const hex = head === 120 || head === 88;
+    return decodeNumericCharacterReference($2.slice(hex ? 2 : 1), hex ? 16 : 10);
+  }
+  return decodeNamedCharacterReference($2) || $0;
+}