Draft: Gitlab ci image build

sync ci image build to fit the manual builds https://reseed-documentation.rd.ruhr-uni-bochum.de/system/deployment/2_image_building/

.gitlab-ci.yml

@@ -20,7 +20,7 @@ variables:
   RAILS_ENV: test
   APK_CACHE_DIR: $CI_PROJECT_DIR/.cache/apk
   RUBY_CACHE_DIR: $CI_PROJECT_DIR/.cache/ruby
-  APK_PACKAGES: nodejs curl libarchive-tools build-base libpq-dev sqlite-dev libxml2-dev tzdata
+  APK_PACKAGES: nodejs curl libarchive-tools build-base git libpq-dev sqlite-dev libxml2-dev tzdata 
 
 cache:
   key: ${CI_COMMIT_REF_SLUG}