First part of gitlab-ci setup

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

.gitlab-ci.yml

@@ -0,0 +1,77 @@
+image: docker:latest
+services:
+  - docker:dind
+
+stages:
+  - build
+  - test
+  - package
+  - release
+
+# Disable the Gradle daemon for Continuous Integration servers as correctness
+# is usually a priority over speed in CI environments. Using a fresh
+# runtime for each build is more reliable since the runtime is completely
+# 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_BRANCH_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
+
+before_script:
+  - export GRADLE_USER_HOME=`pwd`/.gradle
+
+build:
+  image: gradle:jdk15
+  stage: build
+  script: gradle --build-cache compileJava
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: push
+    paths:
+      - build
+      - .gradle
+
+
+test:
+  image: gradle:jdk15
+  stage: test
+  script: gradle --build-cache check
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: pull
+    paths:
+      - build
+      - .gradle
+
+package:
+  image: gradle:jdk15
+  stage: package
+  script: gradle --build-cache assemble
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: push
+    paths:
+      - build
+      - .gradle
+  artifacts:
+    paths:
+      - app/build/libs/moviesquotebot.jar
+
+release:
+  stage: release
+  script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker build . -t $CONTAINER_BRANCH_IMAGE
+    - docker push $CONTAINER_BRANCH_IMAGE
+
+release-master:
+  stage: release
+  script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker build . -t $CONTAINER_RELEASE_IMAGE
+    - docker push $CONTAINER_RELEASE_IMAGE
+  only:
+    - master