Set up docker.yml workflow

[yinchi]

Squashing previous commits (see https://stackabuse.com/git-squash-multiple-commits-in-to-one-commit/):

• Add docker.yml workflow
• Remove poetry.lock from Dockerfiles
  • This is because these files are in .gitignore and our GitHub Action will not work if these files are requested.
• Bugfix: update docker.yml -- Add login step
• Bugfix: update docker.yml -- Add permissions
• Add --no-root to Dockerfiles
  • This is because we do not copy the project files to the build until after Poetry is run.

[yinchi]

This PR partially addresses #45 .