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/css-tree/cjs/parser/parse-selector.cjs

@@ -0,0 +1,8 @@
+'use strict';
+
+const create = require('./create.cjs');
+const parserSelector = require('../syntax/config/parser-selector.cjs');
+
+const parseSelector = create.createParser(parserSelector);
+
+module.exports = parseSelector;