Add predefined tags automatically to Docker

[manumonti]

When a new version of nucypher-porter is released, a GitHub action is triggered that creates a new Docker image and uploads it to Docke hub:

https://github.com/nucypher/nucypher-porter/blob/development/.github/workflows/docker.yml

This action can be completed with some code to also create the following docker tags:

• latest
• tapir
• lynx