I am exploring CD options and I haven't found a way to change the docker image using the CLI.

The use case is version locking per environment.

For a specific app, our deployment workflow is:

1. Build app

2. Docker build-push

3. railway deployment redeploy ... (since the service's source is img:latest)

We have a shared monorepo setup (running in a self-hosted forgejo instance).

The issue is:
When someone from our team changes an environment variable directly in the dashboard (or the CLI), the service will re-pull the image instead of just updating the environment variables and then restarting the deployment.

This also questions the flow for automated production deployments since given this behavior, I don't think we can setup a CICD pipeline that would do it.