Add GitHub Actions workflow for auto-testing

[tzok]

With this commit, every time you push new code into the master branch or create a pull request against it, GitHub will handle the testing process. It will create a temporary Docker image, run a container with it, and then perform the necessary tests.

This feature is particularly beneficial for pull requests. You can wait for GitHub to show a green checkmark, indicating that everything is working correctly. This way, you can have more confidence when merging new code into the master branch.