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/unstorage/drivers/utils/cloudflare.d.mts

@@ -0,0 +1,3 @@
+export declare function getBinding(binding: KVNamespace | R2Bucket | string): KVNamespace<string> | R2Bucket;
+export declare function getKVBinding(binding?: KVNamespace | string): KVNamespace;
+export declare function getR2Binding(binding?: R2Bucket | string): R2Bucket;