Improve Traefik secuity settings, add security documentation#2854

jameswilliams1 wants to merge 7 commits intocookiecutter:maincookiecutter/cookiecutter-django:mainfrom

jameswilliams1:bugfix/2841-traefik-uses-weak-security-settings-by-defaultjameswilliams1/cookiecutter-django:bugfix/2841-traefik-uses-weak-security-settings-by-defaultCopy head branch name to clipboard