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/integration.d.ts

@@ -0,0 +1,10 @@
+import type { AstroSettings } from '../types/astro.js';
+import type { AstroIntegration } from '../types/public/integrations.js';
+/**
+ * This integration is applied when the user is using Actions in their project.
+ * It will inject the necessary routes and middlewares to handle actions.
+ */
+export default function astroIntegrationActionsRouteHandler({ settings, filename, }: {
+    settings: AstroSettings;
+    filename: string;
+}): AstroIntegration;