Add Docker build in CI

.gitlab-ci.yml

@@ -1,6 +1,12 @@
 stages:
   - test
   - quality-assurance
+  - build
+  - release
+
+variables:
+  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
 
 py312:
   stage: test
@@ -27,3 +33,29 @@ linters:
     - pip install tox --no-cache-dir
   script: tox -e linters
   allow_failure: true
+
+build-image:
+  image: docker
+  stage: build
+  services:
+    - docker:dind
+  before_script:
+    - echo "$CI_REGISTRY_PASSWORD" | docker login $CI_REGISTRY -u $CI_REGISTRY_USER --password-stdin
+  script:
+    - docker build --pull -t $CONTAINER_TEST_IMAGE .
+    - docker push $CONTAINER_TEST_IMAGE
+
+release-image:
+  image: docker
+  stage: release
+  services:
+    - docker:dind
+  before_script:
+    - echo "$CI_REGISTRY_PASSWORD" | docker login $CI_REGISTRY -u $CI_REGISTRY_USER --password-stdin
+  script:
+    - docker pull $CONTAINER_TEST_IMAGE
+    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_RELEASE_IMAGE
+    - docker push $CONTAINER_RELEASE_IMAGE
+  rules:
+    - if: $CI_COMMIT_BRANCH == "main"
+