Describe the backend runtime and server-side package composition.
The backend is centered on @universo/core-backend, which boots the Express application, initializes the shared Knex runtime, runs platform migrations, mounts service routers, and serves the frontend bundle.
Runtime Pattern
Express provides HTTP routing and middleware composition.
Feature packages own routes, services, and SQL-first persistence helpers.
@universo/migrations-platform validates and runs platform migrations.
@universo/database provides the shared Knex singleton and executor factories.
Current Domain Surface
The active public backend surface includes auth, onboarding, profiles, metahubs, publications, applications, admin flows, and OpenAPI docs support.
This is a modular business backend for shared platform services.