First release

First release with minimal working functionality.
Supported os:

• Windows (only via docker cli. maybe downloaded from https://github.com/StefanScherer/docker-cli-builder/releases/latest)
• Macos (not signed binary :( )
• Linux

Implemented:

• Configure docker host from
  • DOCKER_HOST environment variable
  • --docker_host arg when start
  • current selected context in docker context
• Getting published ports
• Starting proxies from localhost:published_port to docker host:published_port. But now implemented only TCP proxy
• Managing proxies (starting new and stopping old)