CD Pipeline: Automated Release Process

[mrzzy]

Features

• Able to parse version information from Git Tags.
• Publish bentobox-sdk pip package onto Pypi.
• Mypy/isort/flake8 lint on bentobox-sdk. (ensure that isort is configured to be compatible with black)
• Push the bentobox-engine Docker image to ghcr.io, replace docker image caching with pulling the latest image instead.
• Deploy bentobox-engine on GKE

Fixes

• Replace docker image caching in favor of just pulling the previous docker image
  • Pulling and uploading the cache now takes longer than just building from scratch
• Fix name: "build & push docs" even though no pushing is involved.
• Remove unnecessary step dependencies between steps needs: (ie build docs can run concurrently with unit tests)