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/csso/cjs/clean/WhiteSpace.cjs

@@ -0,0 +1,7 @@
+'use strict';
+
+function cleanWhitespace(node, item, list) {
+    list.remove(item);
+}
+
+module.exports = cleanWhitespace;