What would you like to be added?

It's not a bug at all.

I've converted a single docker compose file to get several kubernetes deployment files out of it.

Some services were in uppercase (for no reason) in the compose file, they were not changed in the converted version.

So when I try applying my file to kubectl, here's what I got :

The Deployment "icm" is invalid: spec.template.spec.containers[0].name: Invalid value: "ICM": a lowercase RFC 1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name', or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')

This is a small detail the converter could look for.

Why is this needed?

It would avoid a next manual step in the conversion, and it would teach us to not put uppercase in our files to look cool...