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/render/component.d.ts

@@ -0,0 +1,11 @@
+import type { RouteData, SSRResult } from '../../../types/public/internal.js';
+import { type RenderInstance } from './common.js';
+import { type ComponentSlots } from './slot.js';
+declare const needsHeadRenderingSymbol: unique symbol;
+export declare function renderComponent(result: SSRResult, displayName: string, Component: unknown, props: Record<string | number, any>, slots?: ComponentSlots): RenderInstance | Promise<RenderInstance>;
+export declare function renderComponentToString(result: SSRResult, displayName: string, Component: unknown, props: Record<string | number, any>, slots?: any, isPage?: boolean, route?: RouteData): Promise<string>;
+export type NonAstroPageComponent = {
+    name: string;
+    [needsHeadRenderingSymbol]: boolean;
+};
+export {};