added tests and config for pytest

[yaswanthsaivendra]

Things I have added

• image
• added tests for one POST and one GET view
• created separate config for development, production and testing
• made changes to settings.py to use the config
• used a separate test database
• added pytest.ini file for pytest configuration.
• temporarily ignored depreciation warnings in pytest config gile to avoid cluttering my terminal.
• made use of a fixture to setup client
• setup includes creating and removing db before each test to ensure isolation between tests

To run pytest. setup the repo and enter the docker container by
docker compose exec -it <containter_name> /bin/bash
It will capture an interactive shell . Inside the shell run pytest