Add v2 build

.gitlab-ci.yml

@@ -3,6 +3,7 @@ stages:
   - check_style
   - test
   - build
+  - build_v2
 before_script:
   - pip install tox==4.5.1
 
@@ -42,3 +43,14 @@ build_image:
     - docker image tag $DOCKERHUB_NAME $CI_REGISTRY_IMAGE:latest
     - docker push $CI_REGISTRY_IMAGE
 
+build_v2:
+  stage: build_v2
+  image: 'docker:18.09.7'
+  only:
+    - v2
+  services:
+    - 'docker:18.09.7-dind'
+  script:
+    - docker build -t $CI_REGISTRY_IMAGE:v2 .
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker push $CI_REGISTRY_IMAGE:v2