Follow the quickstart guide to get started with Server Side SDK. Server Side SDK is available in PHP, Ruby, Java and Node.js. If Server Side SDK is not available in your choice of programming language then you can directly use OST Platform API.
You can optionaly follow React Native Wallet SDK.
Ensure you have implemented and tested all the flows.
To move to production environment you need to get in touch with OST Platform team. OST Platform team will enable your production switch and then can you move to production environment using the switch available in OST Platform dashboard.