Conduit is a fork from Stablekernel's Aqueduct webserver framework. The project originally split off when null-safety was introduced as a feature in Dart. Stablekernel elected to discontinue development for Aqueduct and a community effort began to resurrect the framework as Conduit.
For an educational experience read the Core Concepts page while working through the tutorial. If you simply need to start up a project quickly, you can use templates to deploy servers with authentication and database logic allready implemented. For additional information about Conduit read the API Reference.
Conduit is catered towards test-driven development - the best way to write an application is to write tests using a test harness and run those tests after implementing an endpoint. You may also run the command conduit document client in your project directory to generate a web client for your application. This client can be opened in any browser and will execute requests against your locally running application.