gitlab-ci: build docker for non-protected branches too

.gitlab-ci.yml

@@ -45,15 +45,26 @@ build_docker:
   stage: build
   image: docker:latest
   services: ['docker:dind']
+  script:
+    - 'docker build --pull -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_SHA}" -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_SLUG}" .'
+  only:
+    - branches
+  except:
+    - main
+    - dev
+
+push_docker:
+  extends: build_docker
   before_script:
     - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin "$CI_REGISTRY"
   script:
-    - docker build --pull -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_SHA}" -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_SLUG}" .
+    - !reference [build_docker, script]
     - if [[ "$CI_COMMIT_REF_NAME" == "main" ]]; then docker image tag "${CI_REGISTRY_IMAGE}:${CI_COMMIT_SHA}" "${CI_REGISTRY_IMAGE}:latest"; fi
     - docker push -a "${CI_REGISTRY_IMAGE}"
   only:
     - main
     - dev
+  except:
 
 .docs:
   image: "${CI_REGISTRY_IMAGE}:dev"