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-hast/lib/revert.js

@@ -0,0 +1,49 @@
+/**
+ * @import {ElementContent} from 'hast'
+ * @import {Reference, Nodes} from 'mdast'
+ * @import {State} from './state.js'
+ */
+
+/**
+ * Return the content of a reference without definition as plain text.
+ *
+ * @param {State} state
+ *   Info passed around.
+ * @param {Extract<Nodes, Reference>} node
+ *   Reference node (image, link).
+ * @returns {Array<ElementContent>}
+ *   hast content.
+ */
+export function revert(state, node) {
+  const subtype = node.referenceType
+  let suffix = ']'
+
+  if (subtype === 'collapsed') {
+    suffix += '[]'
+  } else if (subtype === 'full') {
+    suffix += '[' + (node.label || node.identifier) + ']'
+  }
+
+  if (node.type === 'imageReference') {
+    return [{type: 'text', value: '![' + node.alt + suffix}]
+  }
+
+  const contents = state.all(node)
+  const head = contents[0]
+
+  if (head && head.type === 'text') {
+    head.value = '[' + head.value
+  } else {
+    contents.unshift({type: 'text', value: '['})
+  }
+
+  const tail = contents[contents.length - 1]
+
+  if (tail && tail.type === 'text') {
+    tail.value += suffix
+  } else {
+    contents.push({type: 'text', value: suffix})
+  }
+
+  return contents
+}