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/zod/v3/errors.js

@@ -0,0 +1,9 @@
+import defaultErrorMap from "./locales/en.js";
+let overrideErrorMap = defaultErrorMap;
+export { defaultErrorMap };
+export function setErrorMap(map) {
+    overrideErrorMap = map;
+}
+export function getErrorMap() {
+    return overrideErrorMap;
+}