Flutter Live Streaming App Setup

I have purchased a Flutter-based app from Codecanyon and need full setup assistance:

https://codecanyon.net/item/figgy-live-streaming-video-call-chat-host-agency-panel-flutter-ios-android-app-script/58577440

Features:
- Live streaming
- Video calls (1-on-1)
- Chat
- Admin / Host / Agency panels
- Flutter-based mobile app (iOS & Android)

What I need:
- Server setup (Ubuntu VPS preferred)
- WebRTC signaling + TURN/STUN configuration
- Connect mobile app to backend
- Android APK build (+ iOS)
- Publishing support (Play Store / App Store – optional)

In short, making it fully operational and delivered