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/node-fetch-native/dist/proxy-stub.mjs

@@ -0,0 +1 @@
+var n=Object.defineProperty;var e=(t,r)=>n(t,"name",{value:r,configurable:!0});var i=Object.defineProperty,c=e((t,r)=>i(t,"name",{value:r,configurable:!0}),"e");function a(){return{agent:void 0,dispatcher:void 0}}e(a,"createProxy"),c(a,"createProxy");function o(){return globalThis.fetch}e(o,"createFetch"),c(o,"createFetch");const h=globalThis.fetch;export{o as createFetch,a as createProxy,h as fetch};