Merge branch 'pr-gitlab-ci' into 'master'

Add GitLab CI Configuration

See merge request hifis-technical-platform/helmholtz-marketplace-server!2

.github/workflows/docker.yml

-name: Docker
-
-on:
-    push:
-        branches: [ master ]
-    release:
-        types: [published]
-
-jobs:
-    docker_build:
-        name: Create and push Docker image to Docker Hub
-        runs-on: ubuntu-latest
-        steps:
-            - name: Check out the repo
-              uses: actions/checkout@v2
-            - name: Set up JDK 11
-              uses: actions/setup-java@v1
-              with:
-                  java-version: 11
-            - name: Build with Maven
-              run: mvn -B package --file pom.xml
-            - name: Push to Docker Hub
-              uses: docker/build-push-action@v1
-              with:
-                  username: ${{ secrets.DOCKER_USERNAME }}
-                  password: ${{ secrets.DOCKER_PASSWORD }}
-                  repository: helmholtzcloud/marketplace
-                  tag_with_ref: true
-                  tags: latest

.gitlab-ci.yml

+stages:
+    - build
+    - test
+    - pre_package
+    - package
+    - deploy
+
+variables:
+    MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository"
+    DOCKER_IMAGE_TAGGED: helmholtzcloud/marketplace:$CI_COMMIT_SHA
+    DOCKER_IMAGE_LATEST: helmholtzcloud/marketplace:latest
+
+cache:
+    key: "$CI_COMMIT_REF_NAME"
+    paths:
+        - ".m2/repository"
+
+include:
+    - local: .gitlab/ci/create-docker-image-ci.yml
\ No newline at end of file

.gitlab/ci/create-docker-image-ci.yml

+maven_build:
+    only:
+        - master
+        - tags
+        - merge_requests
+    stage: pre_package
+#    dependencies:
+#        - ci_build
+    image: maven:3-jdk-11
+    script: "mvn install"
+    artifacts:
+        paths:
+            - "target/*.jar"
+        expire_in: 600 seconds
+    tags:
+        - "docker"
+
+docker_push:
+    only:
+        - master
+    stage: package
+    image: docker:19.03.11
+    services:
+        - name: docker:19.03.11-dind
+          alias: docker
+    before_script:
+        - docker info
+    script:
+        - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
+        - docker build -t $DOCKER_IMAGE_LATEST .
+#        - docker build -t $DOCKER_IMAGE_TAGGED .
+#        - docker push $DOCKER_IMAGE_TAGGED
+#        - docker tag $DOCKER_IMAGE_TAGGED $DOCKER_IMAGE_LATEST
+        - docker push $DOCKER_IMAGE_LATEST
+    dependencies:
+        - maven_build
+    tags:
+        - "docker"
+