Is it possible to add binary file as variable to gitlab ci?
You can use CI variables. So you can passed Masked credentials
Can you explain please?
I see in my Gitlab UI possibility to add either secret string or secret file, whose content I should add to a text area. No possibility to upload a file
This option was not available for a long time, but according to GitLab Docs, this option was made publicly available in GitLab version 15.7.
It should be available under Settings > CI/CD > Secure Files in your project.
You can read more about it in the official post here.