Use of Docker to run CI tests

[rathorevaibhav]

Describe the task
We're using default Django setup commands (pip install etc) to run CI test cases. Since this does not resembles an actual environment, which is based on docker, the risk of incorrect test results will always be there.

Expected behavior
Research and implement to run tests that uses dockerfile or docker-compose

References
https://stackoverflow.com/questions/64364989/github-actions-how-to-run-test-inside-container