collectstatic --clear removes uploaded assets

[geoffroy-noel-ddh]

We currently have the media folder inside static:

https://github.com/kingsdigitallab/django-bare-bones/blob/develop/project_name/settings/base.py#L227

The problem is that a call to django collectstatic --clear will delete unique content uploaded by editors (it happened to me once when I tried to tidy up static folder after removing apps from a project; fortunately I had a backup!).

I don't think the 'ignore' feature of collectstatic is used by --clear so probably the cleanest option would be to move 'admin' outside 'static' (and update our default django-nginx templates to add the mapping to media):

https://docs.djangoproject.com/en/2.1/ref/contrib/staticfiles/#collectstatic