build the Dockerimage used in CI

.gitlab-ci.yml

@@ -10,18 +10,13 @@ build docker:
     name: gcr.io/kaniko-project/executor:debug
     entrypoint: [""]
   before_script:
-    - docker login -u $CI_DEPLOY_USER -p $CI_DEPLOY_PASSWORD $CI_REGISTRY
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
     - export CI_REF=${CI_COMMIT_TAG:-latest}
   script:
     - /kaniko/executor
       --context $CI_PROJECT_DIR
       --dockerfile $CI_PROJECT_DIR/Dockerfile
       --destination $CI_REGISTRY_IMAGE:$CI_REF
-  only:
-    changes:
-      - Dockerfile
-      - environment.yml
-      - test-requirements.txt
 
 test:
   stage: test