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/encode-info.js

@@ -0,0 +1,82 @@
+/**
+ * @import {EncodeSides} from '../types.js'
+ */
+
+import {classifyCharacter} from 'micromark-util-classify-character'
+
+/**
+ * Check whether to encode (as a character reference) the characters
+ * surrounding an attention run.
+ *
+ * Which characters are around an attention run influence whether it works or
+ * not.
+ *
+ * See <https://github.com/orgs/syntax-tree/discussions/60> for more info.
+ * See this markdown in a particular renderer to see what works:
+ *
+ * ```markdown
+ * |                         | A (letter inside) | B (punctuation inside) | C (whitespace inside) | D (nothing inside) |
+ * | ----------------------- | ----------------- | ---------------------- | --------------------- | ------------------ |
+ * | 1 (letter outside)      | x*y*z             | x*.*z                  | x* *z                 | x**z               |
+ * | 2 (punctuation outside) | .*y*.             | .*.*.                  | .* *.                 | .**.               |
+ * | 3 (whitespace outside)  | x *y* z           | x *.* z                | x * * z               | x ** z             |
+ * | 4 (nothing outside)     | *x*               | *.*                    | * *                   | **                 |
+ * ```
+ *
+ * @param {number} outside
+ *   Code point on the outer side of the run.
+ * @param {number} inside
+ *   Code point on the inner side of the run.
+ * @param {'*' | '_'} marker
+ *   Marker of the run.
+ *   Underscores are handled more strictly (they form less often) than
+ *   asterisks.
+ * @returns {EncodeSides}
+ *   Whether to encode characters.
+ */
+// Important: punctuation must never be encoded.
+// Punctuation is solely used by markdown constructs.
+// And by encoding itself.
+// Encoding them will break constructs or double encode things.
+export function encodeInfo(outside, inside, marker) {
+  const outsideKind = classifyCharacter(outside)
+  const insideKind = classifyCharacter(inside)
+
+  // Letter outside:
+  if (outsideKind === undefined) {
+    return insideKind === undefined
+      ? // Letter inside:
+        // we have to encode *both* letters for `_` as it is looser.
+        // it already forms for `*` (and GFMs `~`).
+        marker === '_'
+        ? {inside: true, outside: true}
+        : {inside: false, outside: false}
+      : insideKind === 1
+        ? // Whitespace inside: encode both (letter, whitespace).
+          {inside: true, outside: true}
+        : // Punctuation inside: encode outer (letter)
+          {inside: false, outside: true}
+  }
+
+  // Whitespace outside:
+  if (outsideKind === 1) {
+    return insideKind === undefined
+      ? // Letter inside: already forms.
+        {inside: false, outside: false}
+      : insideKind === 1
+        ? // Whitespace inside: encode both (whitespace).
+          {inside: true, outside: true}
+        : // Punctuation inside: already forms.
+          {inside: false, outside: false}
+  }
+
+  // Punctuation outside:
+  return insideKind === undefined
+    ? // Letter inside: already forms.
+      {inside: false, outside: false}
+    : insideKind === 1
+      ? // Whitespace inside: encode inner (whitespace).
+        {inside: true, outside: false}
+      : // Punctuation inside: already forms.
+        {inside: false, outside: false}
+}