Small world domination!

When your small bash script docker container gets a pull request featuring arm support and people start complaining on docker hub limits, you start to realize that someone really uses it in the world!

The complete changelog:

• chore: upgraded kubectl to version v1.24.0
• chore: upgraded alpine to version v3.15.3 (#42)
• chore: README fixes by (#37,#40) @moreinhardt
• feat: images are now also published on ghrc.io (#46)
• feat: arm64 support (#38) by @yss14
• feat: added timestamp to output messages (#36) by @sgreene570
• feat: switched to buildkit