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/cli/create-key/infra/crypto-key-generator.js

@@ -0,0 +1,11 @@
+import { createKey, encodeKey } from "../../../core/encryption.js";
+class CryptoKeyGenerator {
+  async generate() {
+    const key = await createKey();
+    const encoded = await encodeKey(key);
+    return encoded;
+  }
+}
+export {
+  CryptoKeyGenerator
+};