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/diff/libesm/util/params.js

@@ -0,0 +1,14 @@
+export function generateOptions(options, defaults) {
+    if (typeof options === 'function') {
+        defaults.callback = options;
+    }
+    else if (options) {
+        for (const name in options) {
+            /* istanbul ignore else */
+            if (Object.prototype.hasOwnProperty.call(options, name)) {
+                defaults[name] = options[name];
+            }
+        }
+    }
+    return defaults;
+}