You've created a KeystoneJS project! This project contains a simple list of users and an admin application (localhost:3000/admin) with basic authentication.
To run this project first run npm install. Note: If you generated this project via the Keystone cli step this has been done for you \o/.
Once running, the Keystone Admin UI is reachable via localhost:3000/admin.
This example has no front-end application but you can build your own using the GraphQL API (http://localhost:3000/admin/graphiql).