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/@astrojs/telemetry/dist/post.js

@@ -0,0 +1,11 @@
+const ASTRO_TELEMETRY_ENDPOINT = `https://telemetry.astro.build/api/v1/record`;
+function post(body) {
+  return fetch(ASTRO_TELEMETRY_ENDPOINT, {
+    method: "POST",
+    body: JSON.stringify(body),
+    headers: { "content-type": "application/json" }
+  });
+}
+export {
+  post
+};