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/astro/dist/actions/loadActions.d.ts

@@ -0,0 +1,8 @@
+import type { SSRActions } from '../core/app/types.js';
+import type { ModuleLoader } from '../core/module-loader/index.js';
+/**
+ * It accepts a module loader and the astro settings, and it attempts to load the middlewares defined in the configuration.
+ *
+ * If not middlewares were not set, the function returns an empty array.
+ */
+export declare function loadActions(moduleLoader: ModuleLoader): Promise<SSRActions>;