Dockerfile COPY failed, file not found

Question

I have the following file structure:

```
/infra/railway/tempo
/infra/railway/tempo/tempo.yaml
/infra/railway/tempo/Dockerfile  
```

This is the contents of the Dockerfile

```
FROM grafana/tempo:latest
COPY ./infra/railway/tempo/tempo.yaml /etc/tempo.yaml
EXPOSE 3200 14268 9095 4317 4318 9411
CMD ["-config.file=/etc/tempo.yaml"]
```

I have a service on railway with the following env var:

```
RAILWAY_DOCKERFILE_PATH=infra/railway/tempo/Dockerfile
```

And I'm getting the following error:

```
[2/2] COPY ./infra/railway/tempo/tempo.yaml /etc/tempo.yaml
failed to calculate checksum of ref 9aadf9f050e3a8w0jm14bepl0::3ghgocjaf0a758ca02tdhyfg8: "/infra/railway/tempo/tempo.yaml": not found
```

I haven't played with this project for quite a while, this was working previously. Not sure what might have changed.

Project id: 28fb16ab-96f2-4c97-a9fe-a70ac8d2d11f