MustRun is the same as Run except it panics on error.

Run creates and starts a docker Container with the `postgres` image.

RunForTest creates and starts a docker Container with the `postgres` image.

RunForTestWithContext creates and starts a docker Container with the `postgres` image.

RunWithContext creates and starts a docker Container with the `postgres` image.

WithInitialDatabase sets POSTGRES_DB.

WithPassword sets POSTGRES_PASSWORD to the given password.

WithUser sets POSTGRES_USER to the given username.