Configured CI to automatically build PYPI packages.

.gitlab-ci.yml

@@ -50,3 +50,16 @@ deployment:
   # do not run any globally defined before_script or after_script for this step
   before_script: []
   after_script: []
+
+deploy_production:
+  stage: deploy
+  before_script:
+   - pip install twine
+   - python setup.py sdist
+  variables:
+    TWINE_USERNAME: $PRODUCTION_USERNAME
+    TWINE_PASSWORD: $PRODUCTION_PASSWORD
+  script:
+    - twine upload dist/*
+  only:
+    - tags
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