This introduces the X-Token header field in the response of newly
uploaded files as a simple way for users to manage their own files.
It does not need to be particularly secure.
SUPPLEMENTALLY:
- Add an `expiration` field to the `file` table of the database
- Produce a migration for the above change
- Overhaul the cleanup script, and integrate into fhost.py
(now run using FLASK_APP=fhost flask prune)
- Replace the old cleanup script with a deprecation notice
- Add information about how to expire files to the index
- Update the README with information about the new script
Squashed commits:
Add a note explaining that expired files aren't immediately removed
Show correct times on the index page graph
Improve the migration script, removing the need for --legacy
Use automap in place of an explicit file map in migration
Remove vestigial `touch()`
Don't crash when upgrading a fresh database
Remove vestigial warning about legacy files
More efficiently filter to unexpired files when migrating
#72 (comment)
Coalesce updates to the database during migration
#72 (comment)
Remove vestigial database model
#72 (comment)
prune: Stream expired files from the database
(as opposed to collecting them all first)
config.example.py: Add min & max expiration + description
