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/html-escaper/test/index.js

@@ -0,0 +1,23 @@
+delete Object.freeze;
+
+var html = require('../cjs');
+
+console.assert(
+  html.escape('&<>\'"') === '&amp;&lt;&gt;&#39;&quot;',
+  'correct escape'
+);
+
+console.assert(
+  html.escape('<>\'"&') === '&lt;&gt;&#39;&quot;&amp;',
+  'correct inverted escape'
+);
+
+console.assert(
+  '&<>\'"' === html.unescape('&amp;&lt;&gt;&#39;&quot;'),
+  'correct unescape'
+);
+
+console.assert(
+  '<>\'"&' === html.unescape('&lt;&gt;&#39;&quot;&amp;'),
+  'correct inverted unescape'
+);