How do I run a command in a deployed container?

Question

I'm using a `Dockerfile` as my deployment method.

Usually platforms (Heroku, Fly, Render, etc) allow you to run something like `railway console` which spins up a container in the same environment to allow you to run short-lived tasks like data migrations.

I tried using `railway ssh` after linking to the correct service and I receive:

```
➜  proj git:(master) ✗ railway ssh         
Expected welcome message, received: ServerMessage { type: "error", payload: ServerPayload { data: Empty, message: "No deployment found to connect to", code: None } }
```

Any help would be greatly appreciated.