✨(documents) add content field as an S3 object

The content field is a writable property on the model which is persisted
in object storage. We take advantage of the versioning, robustness and
scalability of S3.

src/backend/pyproject.toml

@@ -34,7 +34,7 @@ dependencies = [
     "django-parler==2.3",
     "redis==5.0.3",
     "django-redis==5.4.0",
-    "django-storages==1.14.2",
+    "django-storages[s3]==1.14.2",
     "django-timezone-field>=5.1",
     "django==5.0.3",
     "djangorestframework==3.14.0",