Ability to select files or directories

[pgesek]

When running Infrascan in a larger project, it would be good to select which Terraform/compose/Kubernetes files it should scan (especially useful in case of containers), in order to avoid scanning redundant/duplicated/test deployments if that is not necessary.

We should add an -f flag that will allow selecting either a file or a directory.

If the file is selected, only the file should be scanned. If this is not a valid file we can scan, throw an error.

If a directory is scanned, it should be used to look for compose/Kubernetes/Terraform files.

It would be great to be able to provide this option multiple times on one execution.

[pgesek]

I am open to use --include --exclude or some other mechanism for this. We need to select explicitly which files we will scan at the end of the day.