Add support for passing secrets as docker build args

[Greven145]

🧯 Bugfix Description

This PR introduces the ability to enable user secrets during build command execution and the substitution of build arguments from inputs and secrets. This closes #230.

🧰 Technical Solution

• Create a new cli flag --use-secrets and add it to the build command
• Unlock secrets if --use-secrets is specified, regardless of the command's default
• Include the --secret-password option for the build command (for non-interactive builds)
• Add logic to substitute parameter values in docker build args
• Add tests for docker build arg substitution

[prom3theu5]

Thanks for this - I'll check over it tonight :)

[Greven145]

Hey! Any update on this?