multiple docker image build

.gitignore

 /.idea/
 /venv/
 data
+__pycache__

.gitlab-ci.yml

-image: registry.kszk.bme.hu/baseimg/python-tools
+image: python:3.8.5-buster
 
 stages:
   - Get dependencies
@@ -6,32 +6,60 @@ stages:
   - Docker build
 
 variables:
+  # git tag or branch name
   CONTAINER_IMAGE: "registry.kszk.bme.hu/monitoring/pupak:$CI_COMMIT_REF_NAME"
 
 pip:
   stage: Get dependencies
   script:
-    - python --version
     - pip install -r requirements.txt
 
 flake8:
   stage: Static Analysis
   script:
+    - pip install flake8
     - flake8 --max-line-length=120 *.py
 
 pylint:
   stage: Static Analysis
   allow_failure: true
   script:
+    - pip install pylint
     - pylint -d C0301 *.py
 
-docker build:
+docker kszk:
+  extends: .image-template
+  variables:
+    REGISTRY: registry.kszk.bme.hu
+    REGISTRY_USER: "$KSZK_NEXUS_USERNAME"
+    REGISTRY_PASSWORD: "$KSZK_NEXUS_PASSWORD"
+    IMAGE: registry.kszk.bme.hu/monitoring/pupak:$CI_COMMIT_REF_NAME
+
+docker hub:
+  extends: .image-template
+  variables:
+    REGISTRY: "https://index.docker.io/v1/"
+    REGISTRY_USER: "$HUB_USER"
+    REGISTRY_PASSWORD: "$HUB_PASS"
+    IMAGE: robotka/pupak:$CI_COMMIT_REF_NAME
+
+###################### Docker image build template #######################
+
+# hidden job, not gonna run, just for the inheritance
+.image-template:
   stage: Docker build
   image:
     name: gcr.io/kaniko-project/executor:debug
     entrypoint: [""]
   script:
-    - echo "{\"auths\":{\"registry.kszk.bme.hu\":{\"username\":\"$KSZK_NEXUS_USERNAME\",\"password\":\"$KSZK_NEXUS_PASSWORD\"}}}" > /kaniko/.docker/config.json
-    - /kaniko/executor --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --destination "$CONTAINER_IMAGE"
+    - echo "{\"auths\":{\"$REGISTRY\":{\"username\":\"$REGISTRY_USER\",\"password\":\"$REGISTRY_PASSWORD\"}}}"
+      > /kaniko/.docker/config.json
+    - echo "Push $IMAGE to $REGISTRY"
+    - /kaniko/executor
+      --context $CI_PROJECT_DIR
+      --dockerfile $CI_PROJECT_DIR/Dockerfile
+      --destination "$IMAGE"
   only:
     - master
+    - tags
+