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/transitions/swap-functions.d.ts

@@ -0,0 +1,20 @@
+export type SavedFocus = {
+    activeElement: HTMLElement | null;
+    start?: number | null;
+    end?: number | null;
+};
+export declare function detectScriptExecuted(script: HTMLScriptElement): boolean;
+export declare function deselectScripts(doc: Document): void;
+export declare function swapRootAttributes(newDoc: Document): void;
+export declare function swapHeadElements(doc: Document): void;
+export declare function swapBodyElement(newElement: Element, oldElement: Element): void;
+export declare const saveFocus: () => (() => void);
+export declare const restoreFocus: ({ activeElement, start, end }: SavedFocus) => void;
+export declare const swapFunctions: {
+    deselectScripts: typeof deselectScripts;
+    swapRootAttributes: typeof swapRootAttributes;
+    swapHeadElements: typeof swapHeadElements;
+    swapBodyElement: typeof swapBodyElement;
+    saveFocus: () => (() => void);
+};
+export declare const swap: (doc: Document) => void;