feature/refresh-2021-05

[MasterKale]

A long-overdue refresh of the project, including dependencies and nice-to-haves based on my practical use of this project.

Highlights:

• Updated Python to 3.9
• Update Python dependencies:
  • Django==3.2
  • django-redis==4.12.1
  • gunicorn==20.1.0
  • psycopg2-binary==2.8.6
  • flake8==3.9.1
  • flake8-quotes==3.2.0
• Updated Docker dependencies
  • python:3.9
  • postgres:13.2
  • redis:6.2.2
  • nginx:1.19.10-alpine
• Added executable scripts for starting services in dev and prod mode
• Added executable script for easily updating production Django
• Enabled Flake8 linting in VS Code
• Added a .dockerignore to prevent unnecessary/private files from ever accidentally making it into a Django image