Handle Head Requests

[singhgarima]

Issue: #55

Summary

This PR fixes 405 HTTP Status code for HEAD requests and adds unit testing framework

Key Changes

• Handle HEAD Requests

  • Added a middleware which checks for HEAD requests and responds

• Testing Infrastructure

  • Added GitHub Actions workflow for automated testing on PRs to dev branch
  • Created pytest.ini configuration and test dependencies (requirements-test.txt)
  • Established tests/ directory structure with helpers and fixtures
  • Added conftest.py for test environment setup (disables Redis for testing)

• Reusable Test Utilities

  • create_test_user(): Context manager for creating and cleaning up test users
  • access_token_cookie(): Helper for managing authentication tokens in tests

• Documentation

  • Added CONTRIBUTING.md with local development setup instructions and testing instructions

• Code Quality Improvements

  • Fixed deprecated datetime.utcnow() → datetime.now(dt.timezone.utc) in token creation
  • Cleaned up imports and formatting in dependencies.py, auth.py, and admin.py

Testing

All code changes are covered by the new test suite that runs on pull requests.

[seanboyce]

I'll try to review this weekend.

[seanboyce]

Looks fine to me, I'll install locally and check a couple of things now.