Upgrade podio and compile in Debug mode

Please don't merge! This is for my personal use. I'm only submitting the merge request in order to trigger the CI.

I tried running the CI from my personal fork to avoid polluting the list of 'real' merge requests (using my own DockerHub credentials), but my pipelines stall. I don't fully understand how GitLab works, but it looks like my jobs aren't being assigned to any runners. I tried setting the runner tag to 'docker' (previously was 'docker-new') hoping that it would be picked up by a shared runner, but that didn't seem to work.