Unable to run with jailer

I cannot figure out how to run with `jailer` and would be very grateful if someone could explain or - even better - point me to / put in a README. When I run a container, I get

```
noop operation returning shim dir for JailPath jailer=noop runtime=aws.firecracker vmID=b4a7d532-2d98-43f7-ae7f-33cedfe63a96
```

I've tried adding the following to my `firecracker-runtime.json` file, but I don't really know what I am doing as I haven't managed to find any documentation. I have managed to run `firecracker` from `jailer`, but I would like to use `firecracker-containerd` if possible.

```
"jailer": {
"runc_binary_path": "/usr/bin/runc"
}
```

Thanks in advance!

Start by reviewing the README and the firecracker-runtime.json example, then trace how firecracker-containerd invokes jailer when a container runs. Document the required configuration and usage steps for running through jailer, including how the reported noop operation should be interpreted. Done means a newcomer can follow the README to run firecracker-containerd with jailer.

Written by the indexing model from the issue text.