WIP: `docker` pseudo command to allow bamboo-agents run CI tasks inside Kubernetes PODs

The main idea is to emulate real docker CLI behaviour of run / exec and cp commands by executing them in Kubernetes PODs.

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
vendor		vendor
.gitignore		.gitignore
README.md		README.md
cmd.go		cmd.go
cmd_copy.go		cmd_copy.go
cmd_exec.go		cmd_exec.go
cmd_run.go		cmd_run.go
go.mod		go.mod
go.sum		go.sum
main.go		main.go
util.go		util.go

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