Support for publishing multiple specs from a directory

[bajalnyt]

Adds an [optional] parameter specs_dir to the step. If provided, the code scans through all files in the given directory and pushes them one by one.

We have a monorepo that has several yamls, and it is tedious to add a step each time a new spec is created. See here

Need help verifying, is it possible to push the image with a tag, so that I can try it out from our repo?

Closes #5.

[tonglil]

Thanks for submitting!

While I don't particularly like overwriting vargs.Spec for each file, it's acceptable.

Other than the comments, can you add some usage/docs in the README?

We probably need to setup some CI for this as well.
ATM this project is only maintained with volunteered time.

[bajalnyt]

@tonglil , thanks a lot for the review!

I have made those changes, and added a unit test for the code in main.go. The integration test won't run without the key/credential passed in, but it can be used to verify that the specs are picked up correctly.
I mocked it out and converted it into a unit test.

Happy to help build out a CI for this repo, if I you can activate this repo in drone (I don't have the needed access)

[bajalnyt]

@tonglil : appreciate a re-review when you get a chance. Also happy to QA this in one of our repos, if this plugin can be pushed with a specific tag before an official release. Thanks!

[tonglil]

Thanks for all the hard work @bajalnyt.

I'm creating the CI now. Can you take a look at and rebase on-top of #9?

Thanks!