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/runtime/server/astro-component.d.ts

@@ -0,0 +1,9 @@
+import type { PropagationHint } from '../../types/public/internal.js';
+import type { AstroComponentFactory } from './render/index.js';
+interface CreateComponentOptions {
+    factory: AstroComponentFactory;
+    moduleId?: string;
+    propagation?: PropagationHint;
+}
+export declare function createComponent(arg1: AstroComponentFactory | CreateComponentOptions, moduleId?: string, propagation?: PropagationHint): AstroComponentFactory;
+export {};