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/hast-util-to-html/index.d.ts

@@ -0,0 +1,6 @@
+export { toHtml } from "./lib/index.js";
+export type CharacterReferences = import("./lib/index.js").CharacterReferences;
+export type Options = import("./lib/index.js").Options;
+export type Quote = import("./lib/index.js").Quote;
+export type Space = import("./lib/index.js").Space;
+//# sourceMappingURL=index.d.ts.map