Create CI/CD pipeline

[nmaludy]

Create a CI/CD pipeline for unit testing on developer laptops.

[nmaludy]

Links:

• https://docs.djangoproject.com/en/2.1/topics/testing/
• https://docs.djangoproject.com/en/2.1/topics/testing/overview/
• https://docs.djangoproject.com/en/2.1/topics/testing/advanced/#testing-reusable-applications
• https://docs.djangoproject.com/en/2.1/topics/testing/tools/