Attempt to setup auto-deploy on CI/CD

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

.gitlab-ci.yml

@@ -2,7 +2,14 @@
 # This is the Gradle build system for JVM applications
 # https://gradle.org/
 # https://github.com/gradle/gradle
-image: gradle:jdk15
+image: docker:latest
+services:
+  - docker:dind
+
+stages:
+  - build
+  - test
+  - release
 
 # Disable the Gradle daemon for Continuous Integration servers as correctness
 # is usually a priority over speed in CI environments. Using a fresh
@@ -10,11 +17,17 @@ image: gradle:jdk15
 # isolated from any previous builds.
 variables:
   GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+  # Use TLS https://docs.gitlab.com/ee/ci/docker/using_docker_build.html#tls-enabled
+  DOCKER_HOST: tcp://docker:2376
+  DOCKER_TLS_CERTDIR: "/certs"
+  CONTAINER_LATEST_IMAGE: $CI_REGISTRY_IMAGE:latest
 
 before_script:
   - export GRADLE_USER_HOME=`pwd`/.gradle
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
 
 build:
+  image: gradle:jdk15
   stage: build
   script: gradle --build-cache assemble
   cache:
@@ -24,6 +37,7 @@ build:
       - build
       - .gradle
 
+
 test:
   stage: test
   script: gradle check
@@ -31,5 +45,18 @@ test:
     key: "$CI_COMMIT_REF_NAME"
     policy: pull
     paths:
-      - build
+      - build/libs/*.jar
       - .gradle
+
+
+package:
+  stage: release
+  variables: 
+    IMAGE_LATEST_TAG: $CI_REGISTRY_IMAGE:latest
+    IMAGE_COMMIT_REF_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  script:
+    - docker login -u $CI_REGISTRY_IMAGE -p $CI_BUILD_TOKEN $CI_REGISTRY
+    - docker build -t $IMAGE_LATEST_TAG -t $IMAGE_COMMIT_REF_TAG .
+    - docker push $IMAGE_LATEST_TAG $IMAGE_COMMIT_REF_TAG
+  only:
+    - master