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/lru-cache/dist/commonjs/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}

node_modules/lru-cache/dist/esm/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}