Test ci

.gitlab-ci.yml

@@ -2,14 +2,10 @@ stages:
   - build
 
 build:
-  image: debian:stable
+  image: debian:oldstable
   stage: build
   script:
-  - apt-get install software-properties-common
-  - add-apt-repository ppa:openjdk-r/ppa
-  - apt-get update
-  - apt install openjdk-11-jre-headless
-  - apt-get -y install graphviz wget
+  - apt-get update && apt-get -y install graphviz openjdk-11-jre-headless wget
   - wget http://sourceforge.net/projects/plantuml/files/plantuml.1.2022.6.jar/download --output-document=plantuml.jar --quiet
   - java -jar plantuml.jar -charset UTF-8 -o diagrams modellierung/*
   - mkdir public/