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

@@ -6,9 +6,6 @@ stages:
   - test
   - deploy
 
-cache:
-  key: ${CI_COMMIT_REF_SLUG}
-
 services:
   - docker:dind
   - postgres:13-alpine
@@ -21,12 +18,31 @@ variables:
   POSTGRES_PASSWORD: 'password'
   POSTGRES_HOST_AUTH_METHOD: trust
   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
+
+cache:
+  key: ${CI_COMMIT_REF_SLUG}
+  paths: 
+    - $APK_CACHE_DIR
+    - $RUBY_CACHE_DIR
 
 build-job:
   stage: build
   before_script:
-    - apk update && apk upgrade && apk add nodejs curl libarchive-tools build-base libpq-dev sqlite-dev libxml2-dev tzdata
-    - cd hyrax && bundle install --jobs 4 --retry 3
+    - mkdir -p $APK_CACHE_DIR
+    - mkdir -p $RUBY_CACHE_DIR
+    - apk update --cache-dir $APK_CACHE_DIR && apk upgrade --cache-dir $APK_CACHE_DIR && apk add --cache-dir $APK_CACHE_DIR $APK_PACKAGES
+    - cd hyrax && bundle config set --local path 
+
+build-job:
+  stage: build
+  before_script:
+    - mkdir -p $APK_CACHE_DIR
+    - mkdir -p $RUBY_CACHE_DIR
+    - apk update --cache-dir $APK_CACHE_DIR && apk upgrade --cache-dir $APK_CACHE_DIR && apk add --cache-dir $APK_CACHE_DIR $APK_PACKAGES
+    - cd hyrax && bundle config set --local path $RUBY_CACHE_DIR && bundle install --jobs 4 --retry 3
     - cd hyrax && sh deploy_info.sh  && cat ./deploy_info.json
     
   script: