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/escape.d.ts

@@ -0,0 +1,21 @@
+export declare const escapeHTML: (str: string) => string;
+export declare class HTMLBytes extends Uint8Array {
+}
+/**
+ * A "blessed" extension of String that tells Astro that the string
+ * has already been escaped. This helps prevent double-escaping of HTML.
+ */
+export declare class HTMLString extends String {
+    get [Symbol.toStringTag](): string;
+}
+type BlessedType = string | HTMLBytes;
+/**
+ * markHTMLString marks a string as raw or "already escaped" by returning
+ * a `HTMLString` instance. This is meant for internal use, and should not
+ * be returned through any public JS API.
+ */
+export declare const markHTMLString: (value: any) => any;
+export declare function isHTMLString(value: any): value is HTMLString;
+export declare function isHTMLBytes(value: any): value is HTMLBytes;
+export declare function unescapeHTML(str: any): BlessedType | Promise<BlessedType | AsyncGenerator<BlessedType, void, unknown>> | AsyncGenerator<BlessedType, void, unknown>;
+export {};