chore(docker): publish images to docker hub and ghcr.io

[Falci]

This PR adds the GitHub Action to automatically publish docker images to Docker Hub and GHCR.io

It will create image tags as:

• Every merge to master updates the :edge version
• Every git tag: (example: 1.8.1)
  • Updates :1
  • Updates :1.8
  • Creates :1.8.1
  • Updates :latest

Before merging:
Someone with access rights to this repo's settings should add the following secrets:

DOCKERHUB_ACCOUNT
DOCKERHUB_TOKEN (read and write access, from https://app.docker.com/settings/personal-access-tokens)
DOCKERHUB_USERNAME