Providing build arguments via `--build-arg` option when using `dockerfile` directive

[pavelexpertov]

Hello, when you provide a dockerfile directive, it builds an image automatically.

However, I am struggling to find information whether it's possible to provide build arguments when it builds because it's a necessary value for building an image.

So, any ways to provide such arguments via the yaml file?

[pavelexpertov]

@Fluidbyte

I have looked at the source code and I see you don't have the feature.

I believe it is a non-trivial thing to add the ability for people to provide build arguments to a local Dockerfile by providing build arguments when you call commands (e.g. binci shell --build-arg variable_name=value).

I am considering to make a pull-request for to implement such a feature. Hopefully you will be able to guide me as well as review the change to meet common needs and goals.

[ksafranski]

@pavelexpertov I'm happy to review and help with any PR you submit. I'm tied up for the next several weeks but I'll watch for anything you push.