SSEC remaining todos

[Yelinz]

Remaining things from #390 which should be done

• per object encryption based on object name and secret
• FILE_STORAGE_BACKEND mentioned in docs, but no actual use

Todo comments

alexandria/alexandria/core/models.py

Lines 154 to 157 in 13b51f1

	# TODO: decide on how to deal with thumbnail creation
	latest_original.pk = None
	latest_original.document = self
	latest_original.save()

alexandria/alexandria/storages/backends/s3.py

Line 13 in 13b51f1

def get_object_parameters(self, name): # pragma: no cover, TODO: cover

Leftover container

alexandria/docker-compose.override.yml

Lines 9 to 15 in 40c9d94

	media-files:
	image: alpine
	restart: "no"
	volumes:
	- uploads:/media/uploads
	entrypoint: |
	/bin/sh -c "chown -R ${UID}:${UID} /media"