use fau apt mirror

.gitlab-ci.yml

@@ -25,6 +25,7 @@ buildPDF:
   before_script:
     - ln -fs /usr/share/zoneinfo/Europe/Berlin /etc/localtime
     - export DEBIAN_FRONTEND=noninteractive
+    - sed -i -e 's|http://archive.ubuntu.com/ubuntu |http://ftp.fau.de/ubuntu |' -e 's|http://deb.debian.org/debian |http://ftp.fau.de/debian |' /etc/apt/sources.list
     - apt-get update -qq && apt-get install -y -qq eatmydata && eatmydata apt-get install -y -qq make git texlive-full latexmk pandoc
     - git submodule sync --recursive
     - git submodule update --init --recursive --remote