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/ohash/dist/crypto/node/index.mjs

@@ -0,0 +1,5 @@
+import { createHash } from 'node:crypto';
+
+const e=globalThis.process?.getBuiltinModule?.("crypto")?.hash,r="sha256",s="base64url";function digest(t){if(e)return e(r,t,s);const o=createHash(r).update(t);return globalThis.process?.versions?.webcontainer?o.digest().toString(s):o.digest(s)}
+
+export { digest };