Remove upstream dependency to outdated imagemagick docker image
We currently depend on the docker image jujhars13/docker-imagemagick
to crop the pictures in the team page folder. We should simply add imagemagick to the www-gitlab-com docker image, because:
- it removes a remote dependency, which is heavily outdated (Ubuntu 14)
- Builds have been failing in the past:
- It literally just does just install imagemagick: https://github.com/jujhars13/docker-imagemagick/blob/master/Dockerfile#L15