refactor: Move Astro to root, use PORT env (default 80), allow all hosts

- Move Astro files from dealplustech-astro/ to project root
- Update Dockerfile: PORT environment variable (default 80)
- Add vite.config.ts with allowedHosts: true
- Matches nixpacks behavior for Easypanel deployment
- No hardcoded ports or domains

node_modules/svgo/lib/util/visit.js

@@ -0,0 +1,36 @@
+export const visitSkip = Symbol();
+
+/**
+ * @param {import('../types.js').XastNode} node
+ * @param {import('../types.js').Visitor} visitor
+ * @param {any=} parentNode
+ */
+export const visit = (node, visitor, parentNode) => {
+  const callbacks = visitor[node.type];
+  if (callbacks?.enter) {
+    // @ts-expect-error hard to infer
+    const symbol = callbacks.enter(node, parentNode);
+    if (symbol === visitSkip) {
+      return;
+    }
+  }
+  // visit root children
+  if (node.type === 'root') {
+    // copy children array to not lose cursor when children is spliced
+    for (const child of node.children) {
+      visit(child, visitor, node);
+    }
+  }
+  // visit element children if still attached to parent
+  if (node.type === 'element') {
+    if (parentNode.children.includes(node)) {
+      for (const child of node.children) {
+        visit(child, visitor, node);
+      }
+    }
+  }
+  if (callbacks?.exit) {
+    // @ts-expect-error hard to infer
+    callbacks.exit(node, parentNode);
+  }
+};