Automatically able to push all versions of the image with all Multipaper versions

[RemcoSpigot]

Describe the solution you'd like
Automatically able to push all versions of the image with all Multipaper versions through GitHub Actions.

Describe alternatives you've considered
Manual creation and pushing of Docker files.

Additional context
None.

[Matthew-Beckett]

Discussed internally with @RemcoSpigot, the plan is to create a workflow with support for repository_dispatch and build all future builds from a dispatch upstream.

This is dependent on MultiPaper/MultiPaper accepting a PR to dispatch metadata to our actions upon push to dev and main branches.