Refactor GitLab CI/CD pipelines

backend/.gitlab-ci.yml

@@ -3,7 +3,6 @@ stages:
 
 variables:
   REGISTRY: registry.gitlab.com/$CI_PROJECT_PATH
-  TAG: $CI_COMMIT_REF_SLUG
 
 backend_build_job:
   stage: backend_build
@@ -21,32 +20,27 @@ backend_build_job:
 
 build_shared_base_image:
   stage: dockerize
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - docker build -f backend/Dockerfile.base -t $REGISTRY/shared-base:$TAG .
-    - docker push $REGISTRY/shared-base:$TAG
-  needs:
-    - backend_build_job
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: backend
+    DOCKERFILE: Dockerfile.base
+    DOCKER_IMAGE: "$DOCKER_IMAGE/shared-base"
+    DOCKER_BUILD_ARGS: ""
 
 build_gateway_image:
   stage: dockerize
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - docker build --build-arg JAR_FILE=backend/gateway/target/gateway-*.jar -f backend/Dockerfile.service -t $REGISTRY/gateway:$TAG .
-    - docker push $REGISTRY/gateway:$TAG
-  needs:
-    - backend_build_job
-    - build_shared_base_image
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: backend
+    DOCKERFILE: Dockerfile.service
+    DOCKER_IMAGE: "$DOCKER_IMAGE/gateway"
+    DOCKER_BUILD_ARGS: "--build-arg JAR_FILE=gateway/target/gateway-*.jar"
 
 build_discovery_image:
   stage: dockerize
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - docker build --build-arg JAR_FILE=backend/discoveryServer/target/discoveryServer-*.jar -f backend/Dockerfile.service -t $REGISTRY/discovery-server:$TAG .
-    - docker push $REGISTRY/discovery-server:$TAG
-  needs:
-    - backend_build_job
-    - build_shared_base_image
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: backend
+    DOCKERFILE: Dockerfile.service
+    DOCKER_IMAGE: "$DOCKER_IMAGE/discovery-server"
+    DOCKER_BUILD_ARGS: "--build-arg JAR_FILE=discoveryServer/target/discoveryServer-*.jar"