I created a Docker image for the TeX Live 2020 distribution for CI builds. The reason was that the image from https://hub.docker.com/r/blang/latex has its last update two years ago. The /blang/latex image is used for the .gitlab-ci.yml template on GitLab. I want to use it for GitLab.
I build the image from https://www.tug.org/texlive/
Please take a moment to look at the repo and test the image. If the image does not work as desired, please open an issue.