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/@astrojs/compiler/dist/browser/index.d.ts

@@ -0,0 +1,11 @@
+import { transform as transform$1, parse as parse$1, convertToTSX as convertToTSX$1, teardown as teardown$1, initialize as initialize$1 } from '../shared/types.js';
+import '../shared/ast.js';
+import '../shared/diagnostics.js';
+
+declare const transform: typeof transform$1;
+declare const parse: typeof parse$1;
+declare const convertToTSX: typeof convertToTSX$1;
+declare const teardown: typeof teardown$1;
+declare const initialize: typeof initialize$1;
+
+export { convertToTSX, initialize, parse, teardown, transform };