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/handle/definition.js

@@ -0,0 +1,76 @@
+/**
+ * @import {Info, State} from 'mdast-util-to-markdown'
+ * @import {Definition, Parents} from 'mdast'
+ */
+
+import {checkQuote} from '../util/check-quote.js'
+
+/**
+ * @param {Definition} node
+ * @param {Parents | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function definition(node, _, state, info) {
+  const quote = checkQuote(state)
+  const suffix = quote === '"' ? 'Quote' : 'Apostrophe'
+  const exit = state.enter('definition')
+  let subexit = state.enter('label')
+  const tracker = state.createTracker(info)
+  let value = tracker.move('[')
+  value += tracker.move(
+    state.safe(state.associationId(node), {
+      before: value,
+      after: ']',
+      ...tracker.current()
+    })
+  )
+  value += tracker.move(']: ')
+
+  subexit()
+
+  if (
+    // If there’s no url, or…
+    !node.url ||
+    // If there are control characters or whitespace.
+    /[\0- \u007F]/.test(node.url)
+  ) {
+    subexit = state.enter('destinationLiteral')
+    value += tracker.move('<')
+    value += tracker.move(
+      state.safe(node.url, {before: value, after: '>', ...tracker.current()})
+    )
+    value += tracker.move('>')
+  } else {
+    // No whitespace, raw is prettier.
+    subexit = state.enter('destinationRaw')
+    value += tracker.move(
+      state.safe(node.url, {
+        before: value,
+        after: node.title ? ' ' : '\n',
+        ...tracker.current()
+      })
+    )
+  }
+
+  subexit()
+
+  if (node.title) {
+    subexit = state.enter(`title${suffix}`)
+    value += tracker.move(' ' + quote)
+    value += tracker.move(
+      state.safe(node.title, {
+        before: value,
+        after: quote,
+        ...tracker.current()
+      })
+    )
+    value += tracker.move(quote)
+    subexit()
+  }
+
+  exit()
+
+  return value
+}