I [read](https://wiki.cachyos.org/configuration/post_install_setup/#changing-the-default-shell) that `fish` is the default shell for CachyOS, but it seems to be missing from the Docker container? <img width="2478" height="204" alt="Image" src="https://github.com/user-attachments/assets/41236f11-7adc-47ce-aeee-290101e67cf6" />
