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/devalue/index.js

@@ -0,0 +1,4 @@
+export { uneval } from './src/uneval.js';
+export { parse, unflatten } from './src/parse.js';
+export { stringify } from './src/stringify.js';
+export { DevalueError } from './src/utils.js';