Enable file uploads to admin backend with chosen storage solution

[lukehollis]

Following up from email, when @npicardo or I attempt to upload files to the admin interface, we're unable to attach and upload files and receive this error message:

[rsinghal]

I think the following needs to be done:
Create directory that images will be saved to.
Set MEDIA_ROOT and MEDIA_URL in settings.py: https://docs.djangoproject.com/en/2.2/ref/settings/#std:setting-MEDIA_ROOT
Add directory from MEDIA_ROOT to Apache config (let FAS RC know about change for puppet)

[rsinghal]

Question/Concern - do we need to set limits on size of image that can be uploaded?

[rsinghal]

Possibly relevant: https://stackoverflow.com/questions/5517950/django-media-url-and-media-root