`rofl build`: Could warn if secrets aren't passed to a service

[lukaw3d]

either through environment or secrets in compose.yaml

Improves dev experience - it's likely that developer forgot; or made a typo when capitalizing and adding underscores

[matevz]

You're referring to the case when the secrets are defined in ROFL manifest file, but they aren't used in compose.yaml?

[lukaw3d]

yep