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/track.js

@@ -0,0 +1,55 @@
+/**
+ * @import {CreateTracker, TrackCurrent, TrackMove, TrackShift} from '../types.js'
+ */
+
+/**
+ * Track positional info in the output.
+ *
+ * @type {CreateTracker}
+ */
+export function track(config) {
+  // Defaults are used to prevent crashes when older utilities somehow activate
+  // this code.
+  /* c8 ignore next 5 */
+  const options = config || {}
+  const now = options.now || {}
+  let lineShift = options.lineShift || 0
+  let line = now.line || 1
+  let column = now.column || 1
+
+  return {move, current, shift}
+
+  /**
+   * Get the current tracked info.
+   *
+   * @type {TrackCurrent}
+   */
+  function current() {
+    return {now: {line, column}, lineShift}
+  }
+
+  /**
+   * Define an increased line shift (the typical indent for lines).
+   *
+   * @type {TrackShift}
+   */
+  function shift(value) {
+    lineShift += value
+  }
+
+  /**
+   * Move past some generated markdown.
+   *
+   * @type {TrackMove}
+   */
+  function move(input) {
+    // eslint-disable-next-line unicorn/prefer-default-parameters
+    const value = input || ''
+    const chunks = value.split(/\r?\n|\r/g)
+    const tail = chunks[chunks.length - 1]
+    line += chunks.length - 1
+    column =
+      chunks.length === 1 ? column + tail.length : 1 + tail.length + lineShift
+    return value
+  }
+}