Revert settings (#110)

* feat: Set Django settings module in Dockerfile

* fix: Simplify Django settings module configuration in production Dockerfile

Author: prakashchoudhary07

production.Dockerfile

@@ -17,9 +17,8 @@ ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 
 # Set Django settings module
-ARG ENV=production
-ENV ENV=${ENV}
-ENV DJANGO_SETTINGS_MODULE=todo_project.settings.${ENV}
+ENV DJANGO_SETTINGS_MODULE=todo_project.settings.production
+ENV ENV=PRODUCTION
 
 WORKDIR /app