How do I integrate a mini-program or app after successfully deploying Discourse?
Do you mean a plugin? Take a look at Documentation > Developer Guides .
Welcome to Meta. I think you are looking for this:
I have a rough idea of a few approaches:
1 Discourse REST API Documentation - Docs / Integrations - Discourse Meta
2 Configure Webhooks That Trigger on Discourse Events to Integrate with External Services - Community Wiki / Admins - Discourse Meta
3 Simple topic embedding: Embed a List of Discourse Topics onto an External Site - Docs / Integrations - Discourse Meta
How about this?