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/assets/fonts/infra/levenshtein-string-matcher.d.ts

@@ -0,0 +1,5 @@
+import type { StringMatcher } from '../definitions.js';
+export declare class LevenshteinStringMatcher implements StringMatcher {
+    #private;
+    getClosestMatch(target: string, candidates: Array<string>): string;
+}