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/mdn-data/css/index.js

@@ -0,0 +1,9 @@
+module.exports = {
+  atRules:    require('./at-rules'),
+  functions:  require('./functions'),
+  selectors:  require('./selectors'),
+  types:      require('./types'),
+  properties: require('./properties'),
+  syntaxes:   require('./syntaxes'),
+  units:      require('./units'),
+}