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/mdast-util-to-markdown/lib/util/pattern-in-scope.js

@@ -0,0 +1,41 @@
+/**
+ * @import {ConstructName, Unsafe} from 'mdast-util-to-markdown'
+ */
+
+/**
+ * @param {Array<ConstructName>} stack
+ * @param {Unsafe} pattern
+ * @returns {boolean}
+ */
+export function patternInScope(stack, pattern) {
+  return (
+    listInScope(stack, pattern.inConstruct, true) &&
+    !listInScope(stack, pattern.notInConstruct, false)
+  )
+}
+
+/**
+ * @param {Array<ConstructName>} stack
+ * @param {Unsafe['inConstruct']} list
+ * @param {boolean} none
+ * @returns {boolean}
+ */
+function listInScope(stack, list, none) {
+  if (typeof list === 'string') {
+    list = [list]
+  }
+
+  if (!list || list.length === 0) {
+    return none
+  }
+
+  let index = -1
+
+  while (++index < list.length) {
+    if (stack.includes(list[index])) {
+      return true
+    }
+  }
+
+  return false
+}