Update Django project settings

Why these changes are being introduced:
* Clean up files in Solenoid's 'settings' directory to improve
readability and coherence, as well as remove redundant settings between
the files to highlight notable environment-specific settings

How this addresses that need:
* TBD

Side effects of this change:
* Environment variables are loaded using 'django-environ' instead of
'python-dotenv'

Relevant ticket(s):
* TBD

Pipfile

@@ -8,7 +8,9 @@ python_version = "3.11"
 
 [dev-packages]
 black = "*"
+celery-types = "*"
 coveralls = "*"
+django-stubs = "*"
 mypy = "*"
 pre-commit = "*"
 pytest = "*"
@@ -31,6 +33,7 @@ django-ckeditor = "*"
 django-compressor = "*"
 django-crispy-forms = "*"
 django-debug-toolbar = "*"
+django-environ = "*"
 django-libsass = "*"
 gunicorn = "*"
 newrelic = "*"

manage.py

@@ -2,11 +2,8 @@
 import os
 import sys
 
-from dotenv import load_dotenv
-
 
 if __name__ == "__main__":
- load_dotenv()
  os.environ.setdefault("DJANGO_SETTINGS_MODULE", "solenoid.settings.base")
 
  from django.core.management import execute_from_command_line

pyproject.toml

@@ -10,6 +10,10 @@ disallow_untyped_calls = true
 disallow_untyped_defs = true
 exclude = ["tests/"]
 
+[[tool.mypy.overrides]]
+module = ['environ']
+ignore_missing_imports = true
+
 [tool.pytest.ini_options]
 log_level = "INFO"
 

solenoid/celery.py

@@ -10,5 +10,5 @@
 
 
 @app.task(bind=True)
-def debug_task(self):
+def debug_task(self) -> None: # type: ignore
  print("Request: {0!r}".format(self.request))