Replace django-naomi with Mailhog

[jhgv]

Works only when developing using Docker Closes #450

Steps to test

• [ ] Run the project
• [ ] Run the backend shell
• [ ] Run the following snippet

  from django.core.mail import send_mail
  send_mail(
  'Test subject',
  'Here is the test message.',
  'from@example.com',
  ['to@example.com'],
  fail_silently=False,
  )

• [ ] Go to 127.0.0:8025 and check if the email has been sent

Steps to reproduce (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires documentation updates.
• [ ] I have updated the documentation accordingly.
• [ ] My change requires dependencies updates.
• [ ] I have updated the dependencies accordingly.

[vanessa]

What do you think about keeping django-naomi (or using another Django alternative like file backend) for those who don't want to use docker? We use it with docker but we'd force people who don't in case they want to just send some emails.

[jhgv]

@vanessa I think it is better to use another alternative because django-naomi is deprecated. This other alternative you mentioned might be better and there is no need to install another lib.

[vanessa]

@jhgv Ah, nice. Didn't know about django-naomi being deprecated. I'm just worried about having the user with no option other than use docker just to spin up this service. If we don't need to worry about that, then you can ignore this :sweat_smile:

[rvlb]

Installing Mailhog locally seems to be pretty straightforward, maybe we could point to this in our readme. Happy to add it there if that's the case.

Non-docker users must also configure postgres, redis, etc, so I think this shouldn't be a big issue.