Add Dockerfile for Selen

[JarettBakerDunn]

docker/selen contains a Dockerfile to build an image which hosts a built copy of selen. The image is also hosted at geodynamics/selen on Dockerhub.

[gassmoeller]

👍

[gassmoeller]

The file looks correct but the tester is crashing. It looks like the selen-buildenv container that is used for the tests is still using Ubuntu 18.04. Could you try updating the selen-buildenv container, upload a new tester image to docker hub and check if the tests pass then?

[JarettBakerDunn]

hm, I pushed a new image of selen-buildenv to dockerhub, but it doesn't seem like I'm able to manually run the "linux" test action. I might not have the permissions for it.

[gassmoeller]

Seems to be all working now. Can you include the changes you made to the buildenv dockerfile to this PR?

[gassmoeller]

For the future: Even if you do not have the permissions to trigger the test run again, you can always amend your commit without changing anything (git commit --amend) and then force push to your branch on github. This doesnt change anything, but will retrigger the tests on the PR.