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/@shikijs/engine-javascript/dist/index.mjs

@@ -0,0 +1,4 @@
+export { createJavaScriptRegexEngine, defaultJavaScriptRegexConstructor } from './engine-compile.mjs';
+export { createJavaScriptRawEngine } from './engine-raw.mjs';
+export { J as JavaScriptScanner } from './shared/engine-javascript.hzpS1_41.mjs';
+import 'oniguruma-to-es';