The application module that contains the main() function - I call it the Entrypoint module - should be used to connect modules together, so other modules don’t need to know how to wire up modules they depend on. In most cases, it would mean using some kind of Dependency Injection framework, though such a framework is not strictly required (e.g. Golang does just fine without it). The Entrypoint can also be used to provide cross-cutting concerns (authorization, observability, etc) to other modules.
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