When creating a Mailgun add-on on Heroku, the app gets some environment
variables by default:
MAILGUN_API_KEY
MAILGUN_DOMAIN
However, the cookiecutter names do not match and requires a manual step
from the user deploying. It's used elsewhere but shouldn't harm the
other deployment methods to rename these variables.
While updating the docs I noticed a variable that appear unused
DJANGO_MAILGUN_SERVER_NAME so this removes it from the documentation.
Commit 04a58d5 removed the Heroku instant deploy button but the docs
still mention this as an option, this commit updates the docs to reflect
this change.
when `heroku run python manage.py check --deploy` is ran this error occurs
?: (security.W009) Your SECRET_KEY has less than 50 characters or less than 5 unique characters. Please generate a long and random SECRET_KEY, otherwise many of Django's security-critical features will be vulnerable to attack.
changing the num of ran to a larger number fixes this issue
