CI to build/upload to docker hub

[yarikoptic]

Complement to

• Setup CI/CD container workflow action  #158

to

• build docker container and push to docker hub.
  Build for master and releases, Consult
  https://github.com/nipy/heudiconv/blob/master/.github/workflows/docker.yml and
  https://github.com/nipy/heudiconv/blob/master/.github/workflows/release.yml
  for that - to build for master and releases. And we will add generation of singularity into
• add to https://github.com/ReproNim/containers/blob/master/scripts/create_singularities#L444 to get singularity container autobuilt for it as part of the ///repronim/containers