Dockerize the CLI

[artfuldev]

Fixes #10

In this PR, we expose a docker image for the CLI. In addition, we update the documentation.

[artfuldev]

We're kind of blocked on this.

The package is at: https://github.com/sahajsoft/pii-detection-and-anonymizer/pkgs/container/pii

However, it's private and can't be accessed by public. Logging into GHCR needs to be documented at the very least.

[akshaykarle]

We're kind of blocked on this.

The package is at: https://github.com/sahajsoft/pii-detection-and-anonymizer/pkgs/container/pii

However, it's private and can't be accessed by public. Logging into GHCR needs to be documented at the very least.

Logging into the container registry seems to work for me: https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#authenticating-with-a-personal-access-token-classic. We could document this and use it.

However, the container image is huge atm (>3g) might be good to have a better packaging mechanism and then just using that package instead of having to package poetry, python, etc as well in the current Dockerfile