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/semver/functions/rsort.js

@@ -0,0 +1,5 @@
+'use strict'
+
+const compareBuild = require('./compare-build')
+const rsort = (list, loose) => list.sort((a, b) => compareBuild(b, a, loose))
+module.exports = rsort