Add deploy stage to GitLab CI for DockerHub integration

.gitlab-ci.yml

@@ -3,6 +3,7 @@ image: python:latest
 stages:
   - lint
   - test
+  - deploy
 
 before_script:
   - pip install poetry
@@ -26,3 +27,21 @@ test:
       coverage_report:
         coverage_format: cobertura
         path: coverage.xml
+
+deploy_to_dockerhub:
+  stage: deploy
+  needs:
+    - test
+  only:
+    refs:
+      - master
+  except:
+    - tags
+  image: docker:latest
+  services:
+    - docker:dind
+  before_script:
+    - docker login -u $DOCKERHUB_USERNAME -p $DOCKERHUB_PASSWORD
+    - docker buildx create --use
+  script:
+    - docker buildx build --push --tag rogsme/cleanmedia:latest .