Set up continous integration

[bschmalhofer]

Building and testing on multiple platforms and versions sound like a good idea. Based on https://www.youtube.com/watch?v=WfXo71I7LmE&list=WL&index=5&t=0s both Github Workflows and Circle CI look like good tools for that.

See also:

• https://github.com/Perl/docker-perl-tester
• https://github.com/oalders/presentations/blob/master/slides/4-github-actions/marp.pdfPb

Some tests and actions, e.g. tidying and compile tests, can be done on a simple git checkout dir. For more testing an automated setup is required.

[svenoe]

In the beginning we will use Github Actions. Exact scenarios have to be defined.