Create a new binary crate and add the following dependencies:

failure = "0.1"
futures = "0.1"
gotham = "0.3"
gotham_derive = "0.3"
hyper = "0.12"
mime = "0.3"
tokio = "0.1"
tokio-postgres = { git = "https://github.com/sfackler/rust-postgres" }

As you can see, we added the gotham and gotham_derive crates. The first is a framework and the second helps us derive an implementation of the StateData trait for the shared state with the connection we need. The gotham_derive crate can also be used to derive the NewMiddleware trait for middleware, but we don't need special middleware for our example.

We also added the tokio-postgres crate to dependencies. It contains an implementation of an asynchronous database connector for PostgreSQL.