feat: Add buildpacks for building docker image

[Ch4s3r]

• Use semantic-release github action
• Use buildpack for optimized docker images
  • Only build amd64 image as arm is not supported by now from paketo buildpacks
  • smaller image size 350 vs 100mb now
  • publishes latest and versioned tag
• Remove unnecessary matrix build from test
• Add config to package.json that the package is public (as the github action fails to publish to npmjs otherwise with 402)

npmjs:

docker:

• [ ] Test that merging PR creates new version
• [ ] Add changelog entry