Simplify settings files and provide sensible defaults.

[viktorsmari]

In order to make wasa2il easy to use for developers I would like to improve the setup process.

Main objective: Have a single Settings file, and override it with ENV vars. ENV vars are provided via a gitignored file called .env (Best practices)

Steps needed:

• [x] Stop recommending the initial_setup.py because it creates another local_settings.py file

  • The script does a lot like creating a secret key, configuring sqlite, migrate, create superuser, populate with fake data etc.
  • This should simply be documented and the dev can decide if he needs to populate fake data etc
  • When a user has run also the initial_setup script, the Docker container stops using the mysql container and starts writing to an sqlite db inside the app container. Which is not the 'docker way'

• [X] Instead recommend virtualenv as the way do develop

• [x] Remove the wasa2il/default_settings.py

• [x] Don't import default_settings from wasa2il/settings.py lines 12-16

• [x] In settings.py can we use TIME_ZONE = os.environ.get('APP_TIMEZONE') or 'Iceland' to override variables?

• This will result in less confusion like 'which setting file am I now using'?

• We use a single settings file, and overwrite it with ENV vars!

• ENV vars should be read by the host via f.x. an .env file which must be gitignored!

• Django has a package which reads .env files for you: https://github.com/joke2k/django-environ

• docker-compose can read .env files without extra packages through the env_file: .env in docker-compose.yml

[viktorsmari]

The end result of this process should make https://wasa2il-development.herokuapp.com/ always run smoothly. If this site breaks, our process is broken.