Add GitHub as a possible CI using Github Actions

[maxi-k]

First of all, thank you so much for the great template!

Now that it has moved from the lrz gitlab to github, I thought I'd contribute the github action configuration I use for building my thesis.

[bithappens]

Thanks a lot for your snippet! I would really enjoy removing Circle-CI as the only third party tool and directly use the services provided by the git hosts wherever possible. I was not aware of github actions before and I just added CircleCI to support some "free" CI on github.

That said, I have one major concern with your snippet. So far, all build methods rely on the same docker file raabf/latex-versions:texlive2019. Just to ensure that all package versions and dependencies have the same versions. The action you propose uses xucheng/texlive-full:latest.

I am not sure, which docker image is the better one, but we should use the same for all build methods. With my today's knowledge I would prefer the raabf one. Do you know of any way to change the image used in the github action?

[maxi-k]

Good point, I finally got around to creating my own github action which uses the same docker image.
It also uses the Makefile for building the project, which should simplify updates.

Feel free to fork the action into the thesis-toolbox organisation and replacing the respective line in the action definition if you feel that's better in the long run 👍