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/prerender/routing.d.ts

@@ -0,0 +1,15 @@
+import type { AstroSettings, ComponentInstance } from '../types/astro.js';
+import type { RouteData } from '../types/public/internal.js';
+import type { DevPipeline } from '../vite-plugin-astro-server/pipeline.js';
+type GetSortedPreloadedMatchesParams = {
+    pipeline: DevPipeline;
+    matches: RouteData[];
+    settings: AstroSettings;
+};
+export declare function getSortedPreloadedMatches({ pipeline, matches, settings, }: GetSortedPreloadedMatchesParams): Promise<PreloadAndSetPrerenderStatusResult[]>;
+type PreloadAndSetPrerenderStatusResult = {
+    filePath: URL;
+    route: RouteData;
+    preloadedComponent: ComponentInstance;
+};
+export {};